[Misc] Add Issue Templates for Documentation & Misc.

[vaguecoder]

Describe the Request/Issue

Add 2 new templates:

1. Misc. template for any non bug/feature/documentation request.
2. Documentation template for adding/fixing documentation.

Describe the Solution You Think

Add 2 templates in .github

Additional Context

Ownership of Contribution

If the triage is approved,

• I wish to submit the PR myself.