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/.gitignore

@@ -0,0 +1,16 @@
+*.binlog
+*.hprof
+*.xcworkspace/
+*.zip
+.DS_Store
+.gradle/
+.idea/
+.vs/
+.xcode.env
+Pods/
+build/
+dist/*
+!dist/.gitignore
+local.properties
+msbuild.binlog
+node_modules/