* fix(tests): fix ale_c_build_dir_names being unset in tests (#5109)
- Use ale#Set() to set the ale_c_build_dir_names variable.
- Ensure SetUpLinterTest() is called before any Save commands in tests.
- Add c.vim to runtime before non-linter tests are executed.
- Remove workarounds in c.vim.
* feat: Load Prettier from cjs also
* Add support for mdformat
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Co-authored-by: w0rp <devw0rp@gmail.com>
