Before they were rsynced and codesigned multiple times.

Added the cocoapods-search plugin to CocoaPods

[Resolver] Allow platform detection to work for nested dependencies

[FileAccessor] Take exclude_files into account for resource_bundles

[Analyzer] Dont create cycles when computing transitive dependencies

[PodTargetInstaller] Mark all headers with availability levels

Added the cocoapods gem 'cocoapods-search' to the Gemfile
Added the dependency to the cocoapods.gemspec
Deleted the source code for search and the source code for the search specs

Closes https://github.com/CocoaPods/CocoaPods/issues/3967.