ci: skip builds for [skip ci] commits and markdown changes

Adds [skip ci] detection to prevent unnecessary workflow runs when builds are not needed.

Excludes markdown files from triggering iOS builds to reduce resource usage for documentation changes.

Removes redundant node_modules caching step in Android workflow since Bun handles dependency management efficiently.

.github/workflows/build-ios.yml

@@ -8,12 +8,16 @@ on:
   workflow_dispatch:
   pull_request:
     branches: [develop, master]
+    paths-ignore:
+      - '*.md'
   push:
     branches: [develop, master]
+    paths-ignore:
+      - '*.md'
 
 jobs:
   build-ios:
-    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == 'streamyfin/streamyfin'
+    if: (!contains(github.event.head_commit.message, '[skip ci]') && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == 'streamyfin/streamyfin'))
     runs-on: macos-15
     name: 🏗️ Build iOS IPA
     permissions: