Formify issue templates and improve existing (#395)

* Update bug_report.md

* Rename bug_report.md to bug_report.yml

* Update and rename feature_request.md to feature_request.yml

* Create config.yml

* Update PULL_REQUEST_TEMPLATE.md

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,33 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: ''
-labels: ''
-assignees: ''
-
----
-
-#### Describe the bug
-A clear and concise description of what the bug is.
-
-#### To Reproduce
-Steps to reproduce the behavior:
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
-
-#### Expected behavior
-A clear and concise description of what you expected to happen.
-
-#### Screenshots
-If applicable, add screenshots to help explain your problem.
-
-#### Desktop (please complete the following information):
- - OS: [e.g. Windows, MacOS]
- - Browser: [e.g. chrome, firefox]
- - Version: [e.g. 3.22]
- - Matrix homeserver: [e.g. matrix.org]
-
-#### Additional context
-Add any other context about the problem here.