Create kdoc-check.yml

Adding the GitHub action for PRs to check for Kdocs on new functions

.github/workflows/kdoc-check.yml

@@ -0,0 +1,18 @@
+name: KDoc Check
+
+on: pull_request
+
+jobs:
+ kdoc-validation:
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout code
+ uses: actions/checkout@v2
+
+ - name: Setup Python
+ uses: actions/setup-python@v2
+ with:
+ python-version: '3.x'
+
+ - name: Run KDoc check script
+ run: python kdoc_check.py