feat: use ts-install.nvim to automatically install treesitter parsers

[tpwo]

Resolves #1951.

[Christoph-Raab]

Could this be a merge of an array with those defaults and an empty array where one can configure custom parsers?

That would simplify configuring custom parsers with less possibility for merge conflicts.

Something like

local my_parsers = {}
local default_parsers = { 'bash', 'c', 'diff', 'html', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' }

require('ts-install').setup {
  ensure_install = vim.list_extend(my_parsers, default_parsers),
  auto_install = true,
}

[tpwo]

Good point, I noticed that similar approach is used for Mason's ensure_installed, and I replicated that approach:

kickstart.nvim/init.lua

Lines 653 to 658 in 0619d89

	local ensure_installed = vim.tbl_keys(servers or {})
	vim.list_extend(ensure_installed, {
	-- You can add other tools here that you want Mason to install
	})
	require('mason-tool-installer').setup { ensure_installed = ensure_installed }

[tpwo]

Closing this PR, as #1956 implements the same behavior without relying on a new plugin.