* main:
  playground: split test file into multiple ones (#759)
  test redundant alert behavior (#761)
  rename: {Bs_conditional_initial,Res_compmisc} to Initialization.{Global,Perfile} (#776)
  refactor: remove branches that are never created
  rename: bs_exception -> mel_exception
  refactor: move load_unit to Js_cmj_format (#774)
  refactor: only override load_cmi in the playground bundle (#773)
  refactor: use a single output_prefix function (#772)
  refactor: use a dedicated type for artifact extensions (#771)
  refactor: delete ext_fmt and ext_js_file_kind (#770)
  refactor: use a single file -> module_name function (#769)
  refactor: inline ext_char and valid_input_extension (#768)
  chore: clean up unnecessary functions in Ext_array (#767)
  chore(core lib): remove unused files (#765)
  chore: remove unused modules from Ext. (#766)
  chore: simplify `melange.dom` dune rules (#764)
  update opam sw version in makefile (#760)

* main:
  chore: remove some `.cppo` and improve cppo in jscomp/common (#789)
  chore: delete old docs dir (#788)
  Add newer reserved keywords (#785)
  chore: snapshot more info in test (#787)
  chore: track more codegen in dune, delete a few unused scripts (#784)
  chore: remove odoc_gen (#783)