chore: ignore CHANGELOG.md in markdownlint (#20)

Release-please generates CHANGELOG with double blank lines that fail
MD012. Since CHANGELOG is auto-generated, skip it in lint and pre-commit.

Author: jiten-singh-shahi

.githooks/pre-commit

@@ -41,7 +41,7 @@ echo "[pre-commit] ESLint passed."
 
 # ── 3. markdownlint ────────────────────────────────────────────────────────
 echo "[pre-commit] Running markdownlint..."
-if ! npx markdownlint '**/*.md' --ignore node_modules 2>/dev/null; then
+if ! npx markdownlint '**/*.md' --ignore node_modules --ignore CHANGELOG.md 2>/dev/null; then
   echo ""
   echo "[pre-commit] markdownlint failed. Run 'npx markdownlint --fix' to auto-fix."
   exit 1

package.json

@@ -66,7 +66,7 @@
     "build:cursor-agents": "node scripts/dev/build-cursor-agents.js",
     "test": "npm run build && node scripts/ci/validate-agents.js && node scripts/ci/validate-commands.js && node scripts/ci/validate-skills.js && node scripts/ci/validate-hooks.js && node scripts/ci/validate-install-manifests.js && node scripts/ci/validate-no-personal-paths.js && node tests/run-all.js",
     "smoke": "bash scripts/ci/smoke-test.sh",
-    "lint": "eslint . && markdownlint '**/*.md' --ignore node_modules",
+    "lint": "eslint . && markdownlint '**/*.md' --ignore node_modules --ignore CHANGELOG.md",
     "coverage": "c8 --all --include=\"scripts/**/*.js\" --exclude=\"scripts/scc.js\" --reporter=text --reporter=lcov --check-coverage --lines 80 --functions 80 --branches 80 --statements 80 node tests/run-all.js",
     "harness:audit": "node scripts/dev/harness-audit.js",
     "orchestrate:status": "node scripts/dev/orchestration-status.js",