[Suggestion] Setup by default

[Slotos]

Looking at what Mason's .setup does, it looks like plugin/mason.lua file could eagerly set the plugin up with no extra cost to the users:

• enhance the Neovim session's PATH environment

  The only case where this could maybe be postponed is until FileType event sets a known filetype. Even then, if LSP initialization attempt happens before PATH enhancement, Mason won't do what people install it for.

• register commands

  This is exactly what plugin/ folder is for. Setups like lazy.nvim basically replicate what a well-designed plugin can do on its own out of the box.

With this in mind, what do you think about making setup call optional? Custom settings can then be provided via a setup function. Plugin can evne offer lazy setup by emitting a "MasonBeforeInit" custom event during initial require("mason") call, which users would be able to use to set up custom configuration without performing early require.