Create issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report any issues with the platform
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+Found a bug? Please fill out the sections below. 👍
+
+### Issue Summary
+A summary of the issue. This needs to be a clear detailed-rich summary. 
+
+### Steps to Reproduce
+1. (for example) Went to ...
+2. Clicked on...
+3. ...
+
+Any other relevant information. For example, why do you consider this a bug and what did you expect to happen instead?
+
+### Technical details
+* Browser version: You can use https://www.whatsmybrowser.org/ to find this out.
+* Node.js version
+* Anything else that you think could be an issue.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest a feature or idea
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+> Please check if your Feature Request has not been already raised in the [Discussions Tab](https://github.com/calendso/calendso/discussions), as we would like to reduce duplicates. If it has been already raised, simply upvote it 🔼.
+
+### Is your proposal related to a problem?
+<!--
+  Provide a clear and concise description of what the problem is.
+  For example, "I'm always frustrated when..."
+-->
+(Write your answer here.)
+
+### Describe the solution you'd like
+<!--
+  Provide a clear and concise description of what you want to happen.
+-->
+(Describe your proposed solution here.)
+
+### Describe alternatives you've considered
+<!--
+  Let us know about other solutions you've tried or researched.
+-->
+(Write your answer here.)
+
+### Additional context
+<!--
+  Is there anything else you can add about the proposal?
+  You might want to link to related issues here, if you haven't already.
+-->
+(Write your answer here.)

.github/ISSUE_TEMPLATE/questions.md

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+---
+name: Questions
+about: Ask a general question about the project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Please do not use GitHub for asking questions, as this unnecessarily pollutes it. Instead, if you have a general question about Calendso or about Calendso's features we encourage you to post on our Slack workspace instead: [Calendso's Slack](https://calendso.com/slack). The maintainers and other community members can provide help and answer your questions there.
+
+If you've discovered a bug or would like to propose a change/new feature please use one of the other issue templates.
+
+Thanks!