Add new performance issue template (#1499)

.github/ISSUE_TEMPLATE/performance.yml

@@ -0,0 +1,160 @@
+name: "Performance issue report"
+description: "Let us know about issues with performance, such as slow speed or abnormally high CPU or memory usage."
+labels: [performance]
+assignees: []
+body:
+  - type: markdown
+    attributes:
+      value: We use GitHub issues for tracking bugs and enhancements. For questions, please use [the community forum](https://discuss.hashicorp.com/c/terraform-core/terraform-editor-integrations/) where there are more people ready to help.
+
+  - type: input
+    id: version
+    attributes:
+      label: Language Server Version
+      description: |
+        Run `terraform-ls --version` to show the version.
+        If you are not running the latest version, please try upgrading because your issue may have already been fixed.
+      placeholder: v0.31.2
+    validations:
+      required: true
+
+  - type: input
+    id: terraform
+    attributes:
+      label: Terraform Version
+      description: |
+        Run `terraform -v` to show the version. Make sure you are running the same binary that the language server would normally pick up from $PATH if you have more than one version installed on your system.
+      placeholder: Terraform v1.4.6 on darwin_arm64
+    validations:
+      required: true
+
+  - type: input
+    id: client
+    attributes:
+      label: Client Version
+      description: |
+        Please share what IDE and/or plugin interacts with the server.
+      placeholder: Sublime Text (LSP plugin) v0.9.7
+    validations:
+      required: true
+
+  - type: textarea
+    id: behavior
+    attributes:
+      label: Behavior
+      description: |
+        What happens? What symptoms of poor performance are you seeing? Please give a clear and concise description in plain English.
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to Reproduce
+      description: |
+        Please list the steps required to reproduce the issue. If applicable, add screenshots to help explain your problem.
+      placeholder: |
+        1. Open a folder in IDE XYZ
+        2. Open file example.tf from that folder
+        3. Trigger autocompletion on line 5, column 1 (1-indexed)
+    validations:
+      required: true
+
+  - type: textarea
+    id: configuration
+    attributes:
+      label: Terraform Configuration
+      description: |
+        Include the relevant Terraform configuration that might be helpful for reproducing your issue.
+        Please remove any sensitive information such as passwords before sharing configuration snippets.
+
+        For large Terraform configs, please use a service like Dropbox and share a link to the ZIP file.
+        For security, you can optionally encrypt the files using [HashiCorp's GPG public key](https://www.hashicorp.com/security#secure-communications).
+      placeholder: |
+        resource "github_repository" "test" {
+          name = "vscode-terraform"
+        }
+
+        # etc...
+      render: terraform
+    validations:
+      required: false
+
+  - type: textarea
+    id: tree
+    attributes:
+      label: Project Structure
+      description: |
+        Optionally, use `tree` to output ASCII-based hierarchy of your project.
+      placeholder: |
+        .
+        ├── LICENSE
+        ├── README.md
+        ├── aks
+        │   ├── main.tf
+        │   ├── outputs.tf
+        │   ├── terraform.tfvars.example
+        │   ├── variables.tf
+        │   └── versions.tf
+        ├── consul
+        │   ├── dc1.yaml
+        │   ├── dc2.yaml
+        │   ├── main.tf
+        │   ├── proxy_defaults.tf
+        │   └── versions.tf
+        ├── counting-service
+        │   ├── main.tf
+        │   └── versions.tf
+        └── eks
+            ├── kubernetes.tf
+            ├── main.tf
+            ├── outputs.tf
+            ├── variables.tf
+            └── versions.tf
+      render: sh
+    validations:
+      required: false
+
+  - type: input
+    id: gist
+    attributes:
+      label: Gist
+      description: |
+        If possible, please provide a link to a [GitHub Gist](https://gist.github.com/) with your full debug output.
+        Do *NOT* pastethe debug output in the issue, since it may be long.
+
+        Full debug output can be obtained by launching the server with a particular flag (e.g. `-log-file`).
+        Please follow the instructions in [`docs/TROUBLESHOOTING.md`](https://github.com/hashicorp/terraform-ls/tree/main/docs/TROUBLESHOOTING.md).
+
+        Debug output may contain sensitive information. Please review it before posting publicly, and if you are concerned, feel free to encrypt the files using [HashiCorp's GPG public key](https://www.hashicorp.com/security#secure-communications).
+      placeholder: |
+        https://gist.github.com/gdb/b6365e79be6052e7531e7ba6ea8caf23
+    validations:
+      required: false
+
+  - type: textarea
+    id: references
+    attributes:
+      label: References
+      description: |
+        Are there any other GitHub issues (open or closed) or pull requests that relate to this issue? Or links to documentation pages?
+        Guide to referencing Github issues: https://help.github.com/articles/basic-writing-and-formatting-syntax/#referencing-issues-and-pull-requests
+      placeholder: |
+        - #123
+        - #456
+        - hashicorp/terraform#789
+        - https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks
+    validations:
+      required: false
+
+  - type: textarea
+    id: community
+    attributes:
+      label: Community Note
+      description: Please do not remove, edit, or change the following note for our community. Just leave everything in this textbox as-is.
+      value: |
+        - Please vote on this issue by adding a 👍 [reaction](https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/) to the original issue to help the community and maintainers prioritize this request
+        - Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request
+        - If you are interested in working on this issue or have submitted a pull request, please leave a comment
+    validations:
+      required: true