feat(template): pull request template (#624)

## Introduction ✏️ 
Pre-populate PR body.

## Resolution ✔️ 
* Added `PULL_REQUEST_TEMPLATE.md`.

## Miscellaneous ➕ 
* Dependencies update
* TS configuration file fix with node version updated to `21.0.0`.

Author: audrius-vaitonis

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+## Introduction :pencil2:
+Include a summary of the changes and related feature(s) or issue(s).
+
+## Resolution :heavy_check_mark:
+List all changes made to the codebase.
+
+## Miscellaneous :heavy_plus_sign:
+List any additional fixes or improvements.
+