feat!: use GIT_EXTERNAL_DIFF

Remove all file preparation, now handled by git.
Remove submodule.
Rework sample workflow.
Update doc.
Rework diff script to be used by GIT_EXTERNAL_DIFF.
Remove VSCode launch config.

BREAKING CHANGE: Total rework

.github/workflows/main.yaml

@@ -15,59 +15,16 @@ jobs:
           ref: ${{ github.ref }}
           fetch-depth: 2
 
-      - name: Find changed json
-        id: changed-json
-        uses: tj-actions/[email protected]
-        with:
-          files: |
-            **/*.json
-          include_all_old_new_renamed_files: true
-
-      - name: Copy head paths files
-        run: |
-          mkdir head
-          touch head/acmr.txt
-          for file in ${{ steps.changed-json.outputs.added_files }}; do
-            echo "A,head/${file}" >> head/acmr.txt
-            cp --parents $file head/
-          done
-          for file in ${{ steps.changed-json.outputs.copied_files }}; do
-            echo "C,head/${file}" >> head/acmr.txt
-            cp --parents $file head/
-          done
-          for file in ${{ steps.changed-json.outputs.modified_files }}; do
-            echo "M,head/${file}" >> head/acmr.txt
-            cp --parents $file head/
-          done
-          for file in ${{ steps.changed-json.outputs.renamed_files }}; do
-            echo "R,head/${file}" >> head/acmr.txt
-            cp --parents $file head/
-          done
-
-      - name: Checkout base
-        run: git checkout $(git --no-pager log --oneline -n 2 | awk 'NR==2 {print $1}')
-
-      - name: Copy base paths
-        run: |
-          mkdir base
-          touch base/mrd.txt
-          for file in ${{ steps.changed-json.outputs.modified_files }}; do
-            echo "M,${file}" >> base/mrd.txt
-          done
-          for file in ${{ steps.changed-json.outputs.all_old_new_renamed_files }}; do
-            echo "R,${file}" >> base/mrd.txt
-          done
-          for file in ${{ steps.changed-json.outputs.deleted_files }}; do
-            echo "D,${file}" >> base/mrd.txt
-          done
-
       - name: Setup requirements and script
         run: |
           pip install rich
           pip install json_source_map
-          git clone --depth 1 https://gist.github.com/74017707b676c3ce947528fb00dd46d0.git fsjd
+          wget https://raw.githubusercontent.com/robproject/fsjd/main/frappe_schema_json_diff.py
 
-      - name: Diff table
-        run: python3 fsjd/frappe_schema_json_diff.py base/mrd.txt head/acmr.txt 1
+      - name: Run script file
+        run: |
+          chmod +x ./run.sh
+          ./run.sh
+        shell: bash