chore: Add PR and issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: 🐞 Bug report
+about: Help us to improve by reporting a bug
+labels: 0. Needs triage, bug
+---
+
+<!--- Please keep this note for other contributors -->
+
+### How to use GitHub
+
+* Please use the 👍 [reaction](https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/) to show that you are affected by the same issue.
+* Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.
+* Subscribe to receive notifications on status change and new comments.
+
+---
+
+
+## Steps to reproduce
+1.
+2.
+3.
+
+### Expected behaviour
+Tell us what should happen
+
+### Actual behaviour
+Tell us what happens instead (🖼️ screenshots often help)
+
+## Desktop client
+
+**Talk Desktop client version:** v1.0.0
+
+**Operating system:** Windows / MacOS / Ubuntu
+
+**Operating system version:** Windows 11 / (In case of Linux, provide the distribution.)
+
+**Microphone available:** yes/no
+
+**Camera available:** yes/no
+
+## Server
+
+**Nextcloud version:** (see status page: `/status.php`)
+
+**Talk app version:** (see apps admin page: `/index.php/settings/apps`)
+
+**Custom Signaling server configured:** yes/no and version (see additional admin settings: `/index.php/index.php/settings/admin/talk#signaling_server`)
+
+**Custom TURN server configured:** yes/no (see additional admin settings: `/index.php/settings/admin/talk#turn_server`)
+
+**Custom STUN server configured:** yes/no (see additional admin settings: `/index.php/settings/admin/talk#stun_server`)
+
+## Logs
+
+### Client log
+
+<details>
+
+```
+Insert your browser log here, this could for example include:
+a) The javascript console log
+b) The network log
+c) ...
+```
+
+</details>

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: 🚀 Feature request
+about: Suggest an idea for the Nextcloud Talk desktop client
+labels: 0. Needs triage, enhancement
+---
+
+<!--- Please keep this note for other contributors -->
+
+### How to use GitHub
+
+* Please use the 👍 [reaction](https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/) to show that you are interested into the same feature.
+* Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.
+* Subscribe to receive notifications on status change and new comments.
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/pull_request_template.md

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+### ☑️ Resolves
+
+* Issue #…
+
+### 🖼️ Screenshots
+
+🏚️ Before | 🏡 After
+---|---
+B | A
+
+### 🚧 Tasks
+
+- [ ] ...