ci: Merge SwiftLint and DocC workflows into single CI pipeline

Three jobs in one workflow:
1. lint — SwiftLint via Homebrew (runs on push + PR)
2. build-docs — DocC generation (runs after lint, push to main only)
3. deploy — GitHub Pages deployment (runs after build-docs)

Removes the separate docc.yml and swiftlint.yml workflows.

.github/workflows/ci.yml

@@ -1,8 +1,10 @@
-name: Build and Deploy DocC
+name: CI
 
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
   workflow_dispatch:
 
 permissions:
@@ -15,8 +17,25 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build:
+  lint:
+    name: SwiftLint
     runs-on: macos-15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install SwiftLint
+        run: brew install swiftlint
+
+      - name: Run SwiftLint
+        run: swiftlint
+
+  build-docs:
+    name: Build DocC
+    needs: lint
+    runs-on: macos-15
+    # Only build and deploy docs on push to main (not on PRs)
+    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -81,7 +100,8 @@ jobs:
           path: docs-output
 
   deploy:
-    needs: build
+    name: Deploy to GitHub Pages
+    needs: build-docs
     runs-on: ubuntu-latest
     environment:
       name: github-pages

.github/workflows/swiftlint.yml

@@ -1,21 +0,0 @@
-name: SwiftLint
-
-on:
-  push:
-    branches: ['main']
-  pull_request:
-    branches: ['main']
-
-jobs:
-  lint:
-    runs-on: macos-15
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Install SwiftLint
-        run: brew install swiftlint
-
-      - name: Run SwiftLint
-        run: swiftlint