chore(release): use patch bumps for feat commits before v1.0

Add release-please-config.json with bump-patch-for-minor-pre-major=true
so feat: commits produce patch bumps (2.2.0 → 2.2.1) instead of minor
bumps (2.2.0 → 2.3.0) while the project is pre-1.0.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -14,5 +14,6 @@ jobs:
     steps:
       - uses: googleapis/release-please-action@v4
         with:
-          release-type: python
           token: ${{ secrets.GITHUB_TOKEN }}
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "2.2.0"
+}

release-please-config.json

@@ -0,0 +1,12 @@
+{
+  "release-type": "python",
+  "bump-minor-pre-major": true,
+  "bump-patch-for-minor-pre-major": true,
+  "packages": {
+    ".": {
+      "release-type": "python",
+      "bump-minor-pre-major": true,
+      "bump-patch-for-minor-pre-major": true
+    }
+  }
+}