ruby.git/doc/standard_library.md, branch v3_4_9

ruby.git/doc/standard_library.md, branch v3_4_9 The Ruby Programming Language [DOC] Refresh standard libraries page (#12404) 2024-12-20T18:57:02+00:00 Stan Lo stan001212@gmail.com 2024-12-20T18:57:02+00:00 5d1fde06d489893a846bf0e69d18d958a827c27c * Migrate standard library doc page to markdown * Improve libraries listing and link to source code * Fix grammar and improve phrasing Co-authored-by: Jeremy Evans <code@jeremyevans.net>

* Migrate standard library doc page to markdown

* Improve libraries listing and link to source code

* Fix grammar and improve phrasing

Co-authored-by: Jeremy Evans <code@jeremyevans.net>