[FEATURE REQUEST] Refactor `auto_installer` module to use mason.nvim

[connorgmeehan]

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What is the feature, what would you like to be able to do?

Switch to a currently maintained auto installer for LSPs.

What is the use case, why do you want this feature?

nvim-lsp-installer is now deprecated and will fall behind in terms of updates.

Possible Implementation (if applicable)

Additional context