Merge pull request #464 from spacetelescope/new_nb_508_checker

Add notebook accessibility check workflows

Author: dulude

.github/workflows/notebook_accessibility_check_pr.yml

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+## This workflow performs section 508 accessibility checks on Jupyter notebooks created or updated in a pull request
+name: PR-Triggered Jupyter Notebook Accessibility Check
+
+on:
+   pull_request:
+    branches:
+      - main
+    paths:
+      - 'notebooks/**.ipynb'
+
+jobs:
+  Notebook_Accessibility_Check:
+   uses: spacetelescope/notebook-ci-actions/.github/workflows/notebook_accessibility_check_pr.yml@v1

.github/workflows/notebook_accessibility_check_scheduled.yml

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+## This workflow scans all Jupyter notebooks in the repository for Section 508 accessibility issues.
+## It is scheduled to run weekly on Sundays at 0100 UTC, but can also be triggered manually.
+name: Weekly Jupyter Notebook Accessibility Check
+
+on:
+  # Weekly runs at 0100 UTC every Sunday
+  schedule:
+    - cron: "0 1 * * SUN"
+  workflow_dispatch:
+
+jobs:
+    nb_a11y_check:
+      uses: spacetelescope/notebook-ci-actions/.github/workflows/notebook_accessibility_check.yml@v1