fix: CI quality workflow — remove npm cache and use npm install

Lockfiles are gitignored so setup-node cache: npm fails (no package-lock.json).
Switch from npm ci to npm install since there's no lockfile to enforce.

Author: bmadcode

.github/workflows/quality.yaml

@@ -25,10 +25,9 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version-file: ".nvmrc"
-          cache: "npm"
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Prettier format check
         run: npm run format:check
@@ -43,10 +42,9 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version-file: ".nvmrc"
-          cache: "npm"
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: ESLint
         run: npm run lint
@@ -61,10 +59,9 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version-file: ".nvmrc"
-          cache: "npm"
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: markdownlint
         run: npm run lint:md
@@ -79,10 +76,9 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version-file: ".nvmrc"
-          cache: "npm"
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Validate YAML schemas
         run: npm run validate:schemas