Chore: Add issue/pr template and general housekeeping tools and docs (#900)

* Add linting

* Add issue templates and docs

* Add root eslint config and remove tslint

* Autofix lint issues

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,48 @@
+name: Feature Request
+description: Suggest an idea for rrweb
+title: '[Feature Request]: '
+labels:
+  - 'feature request'
+body:
+  - type: checkboxes
+    attributes:
+      label: Preflight Checklist
+      description: Please ensure you've completed all of the following.
+      options:
+        - label: I have searched the [issue tracker](https://www.github.com/rrweb-io/rrweb/issues) for a feature request that matches the one I want to file, without success.
+          required: true
+  - type: dropdown
+    attributes:
+      label: What package is this feature request for?
+      options:
+        - rrweb
+        - rrweb-snapshot
+        - rrdom
+        - rrweb-player
+        - Other (specify below)
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Problem Description
+      description: Please add a clear and concise description of the problem you are seeking to solve with this feature request.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Proposed Solution
+      description: Describe the solution you'd like in a clear and concise manner.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Alternatives Considered
+      description: A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional Information
+      description: Add any other context about the problem here.
+    validations:
+      required: false