chore: rework examples (#4225)

* remove unused examples

* init bare example with test app

* add react-native-video

* add test app suport in expo plugin

* expo plugin: skip keys that are already in pod file

* fix podfile

* add src files

* fix metro config

* finalize react native test app configuration

* init expo example

* remove old examples

* add guide for example

* Add link to examples apps in docs

* adopt bare example to CI tests

* update CI workflows

* CI build lib after node_modules install

* fix examples readme

* fix iOS CI

* Add Example for DRM

* Update examples/README.md

* fix links

* update examples README

* sync example code

* update README

examples/bare/ios/Podfile

@@ -0,0 +1,23 @@
+ws_dir = Pathname.new(__dir__)
+ws_dir = ws_dir.parent until
+  File.exist?("#{ws_dir}/node_modules/react-native-test-app/test_app.rb") ||
+  ws_dir.expand_path.to_s == '/'
+require "#{ws_dir}/node_modules/react-native-test-app/test_app.rb"
+
+workspace 'BareExample.xcworkspace'
+
+use_test_app!
+
+# This is used by CI to test different configurations
+# If you want to enable it look to README.md
+if ENV['RNV_SAMPLE_ENABLE_ADS']
+  $RNVideoUseGoogleIMA = true
+end
+if ENV['RNV_SAMPLE_VIDEO_CACHING']
+  $RNVideoUseVideoCaching = true
+end
+
+# Chache dependencies need to have modular headers
+if defined?($RNVideoUseVideoCaching)
+  use_modular_headers!
+end