Add gdlint job + gdlintrc to Gitea CI

Lints scripts/, db/, scenes/ via gdtoolkit==4.* on ubuntu-latest
(Python, no Godot needed), in parallel with the validate job.
addons/ (third-party LOD plugin) and developers/ (sandbox) are
left out. Non-blocking for now: the export jobs still only need
validate, so a lint regression won't break builds while the
Godot-3 leftover code is being cleaned up.

gdlintrc bumps max-line-length from 100 to 140 because Godot
$-style node paths and typed signatures routinely push past 100
without that being a real readability problem.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -43,7 +43,28 @@ jobs:
           retention-days: 1
 
   # ---------------------------------------------------------------------------
-  # 2. Desktop exports (Windows / Linux / macOS) — runs in parallel.
+  # 2. Static analysis — gdlint from Scony's gdtoolkit (Python, no Godot).
+  #    Runs in parallel with `validate`. Exports do NOT depend on this job,
+  #    so a lint failure does not block builds while the Godot-3 leftovers
+  #    are still being cleaned up. Once the tree is clean, add this job to
+  #    the `needs:` of the export jobs to make it a hard gate.
+  # ---------------------------------------------------------------------------
+  lint:
+    name: Lint GDScript
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install gdtoolkit
+        run: |
+          python3 -m pip install --user "gdtoolkit==4.*"
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+
+      - name: Run gdlint
+        run: gdlint scripts db scenes
+
+  # ---------------------------------------------------------------------------
+  # 3. Desktop exports (Windows / Linux / macOS) — runs in parallel.
   #    macOS preset must be added in the Godot editor before this matrix entry
   #    can succeed (export_presets.cfg currently has none).
   # ---------------------------------------------------------------------------
@@ -93,7 +114,7 @@ jobs:
           retention-days: 14
 
   # ---------------------------------------------------------------------------
-  # 3. Android export — needs JDK + Android SDK on top of the Godot image.
+  # 4. Android export — needs JDK + Android SDK on top of the Godot image.
   #    Provide ANDROID_KEYSTORE_BASE64 as a Gitea secret for a stable signature;
   #    otherwise a fresh debug keystore is generated on each run.
   # ---------------------------------------------------------------------------