Make the package tables mutex-aware and render them from JSON

.gitattributes

@@ -1,2 +1,6 @@
 # SCM syntax highlighting
 pixi.lock linguist-language=YAML linguist-generated=true
+
+# Generated by utils/compare_pkg_completeness.py. Pinning to LF keeps a local
+# run on Windows from rewriting every line against what CI generates on Linux.
+docs/data/*.json text eol=lf linguist-generated=true

.github/workflows/update-package-table.yml

@@ -13,15 +13,11 @@ jobs:
     - name: Checkout robostack.github.io
       uses: actions/checkout@v4
     - uses: prefix-dev/setup-pixi@v0.10.0
+    # foxy and galactic are end-of-life; docs/data/{foxy,galactic}.json are
+    # committed snapshots and deliberately not regenerated here.
     - name: Create table noetic
       run: |
         pixi run compare-completeness noetic robostack-noetic
-    # - name: Create table foxy
-    #   run: |
-    #     pixi run compare-completeness foxy robostack
-    # - name: Create table galactic
-    #   run: |
-    #     pixi run compare-completeness galactic robostack-experimental
     - name: Create table humble
       run: |
         pixi run compare-completeness humble robostack-humble
@@ -42,14 +38,12 @@ jobs:
       run: |
         git config --local user.email "action@github.com"
         git config --local user.name "GitHub Action"
-        git add docs/noetic.md
-        git add docs/foxy.md
-        git add docs/galactic.md
-        git add docs/humble.md
-        git add docs/jazzy.md
-        git add docs/kilted.md
-        git add docs/rolling.md
-        git add docs/lyrical.md
+        git add docs/data/noetic.json
+        git add docs/data/humble.json
+        git add docs/data/jazzy.json
+        git add docs/data/kilted.json
+        git add docs/data/rolling.json
+        git add docs/data/lyrical.json
         git commit -m "Update tables"
       continue-on-error: true
     - name: Push changes