Adds issue templates

.github/ISSUE_TEMPLATE/bug-report---.md

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+---
+name: "Bug Report \U0001F41B"
+about: Submit a bug report for an issue you've come across
+title: "[BUG]"
+labels: "\U0001F41B Bug"
+assignees: Lissy93
+
+---
+
+Thank you for taking the time to raise a bug, and sorry that you've had issues with Dashy 😟
+
+**If applicable to your issue, please include:**
+- A description of the bug, including actual behavior and if applicable, expected behavior
+- Steps to reproduce
+- Info about your system (device, OS, browser and browser version)
+- Any console errors? If the issue happens at runtime, open up the dev tools [F12], and go to the Console tab. If the output is very long, please use [0bin](https://0bin.net/)
+- Any screenshots, if it is a frontend issue
+
+**Before submitting, please ensure that:**
+- [ ] This issue has not already been raised
+- [ ] You are using the latest version of Dashy
+- [ ] You've included the relevant information above

.github/ISSUE_TEMPLATE/feature-request---.md

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+---
+name: "Feature Request \U0001F984"
+about: Suggest an idea for future development of Dashy
+title: "[FEATURE_REQUEST]"
+labels: "\U0001F984 Feature Request"
+assignees: Lissy93
+
+---
+
+**Is your feature request related to a problem? If so, 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. 
+
+**Priority**:
+Low: Nice to have / Medium: Would be useful / High: The app does not function without it

.github/ISSUE_TEMPLATE/question------.md

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+---
+name: "Question \U0001F937‍♀️"
+about: Describe this issue template's purpose here.
+title: "[QUESTION]"
+labels: "\U0001F937‍♂️ Question"
+assignees: Lissy93
+
+---
+
+All questions are welcome :)
+In the meantime, you might find the answer to your questions in the (recently written) [docs](https://github.com/Lissy93/dashy/tree/master/docs)

.github/ISSUE_TEMPLATE/share-feedback---.md

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+---
+name: "Share Feedback \U0001F308"
+about: Share what you think about Dashy, and any ideas or suggestions you have
+title: "[FEEDBACK]"
+labels: "\U0001F308 Feedback"
+assignees: ''
+
+---
+
+

.github/pull_request_template.md

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+**Please check the type of change your PR introduces**:
+- [ ] Bugfix
+- [ ] Feature
+- [ ] Code style update (formatting, renaming)
+- [ ] Refactoring (no functional changes, no api changes)
+- [ ] Build related changes
+- [ ] Documentation content changes
+- [ ] Other (please describe): 
+
+**Issue Number** (if applicable):
+
+**Briefley outline your changes**:
+
+**Before submitting, please ensure that**:
+- [ ] Must be backwards compatible
+- [ ] All lint checks and tests must pass
+- [ ] If a new option in the the config file is added, it needs to be added into the schema, and documented in the configuring guide
+- [ ] If a new dependency is required, it must be essential, and it must be thoroughly checked out for security or efficiency issues