refactor: create function for deferred loading

The benefit of this is that users only pay for what they use. If e.g.
only `vim.lsp.buf_get_clients()` is called then they don't need to load
all modules under `vim.lsp` which could lead to significant startuptime
saving.

Also `vim.lsp.module` is a bit nicer to user compared to
`require("vim.lsp.module")`.

This isn't used for some nested modules such as `filetype` as it breaks
tests with error messages such as "attempt to index field 'detect'".
It's not entirely certain the reason for this, but it is likely it is
due to filetype being precompiled which would imply deferred loading
isn't needed for performance reasons.

runtime/lua/vim/treesitter/query.lua

@@ -12,7 +12,6 @@ Query.__index = Query
 ---@field captures table
 ---@field patterns table<string,any[][]>
 
----@class vim.treesitter.query
 local M = {}
 
 ---@param files string[]
@@ -799,9 +798,9 @@ end
 ---   - clear (boolean) if `true`, just clear current lint errors
 function M.lint(buf, opts)
   if opts and opts.clear then
-    require('vim.treesitter._query_linter').clear(buf)
+    vim.treesitter._query_linter.clear(buf)
   else
-    require('vim.treesitter._query_linter').lint(buf, opts)
+    vim.treesitter._query_linter.lint(buf, opts)
   end
 end
 
@@ -814,7 +813,7 @@ end
 --- ```
 ---
 function M.omnifunc(findstart, base)
-  return require('vim.treesitter._query_linter').omnifunc(findstart, base)
+  return vim.treesitter._query_linter.omnifunc(findstart, base)
 end
 
 --- Opens a live editor to query the buffer you started from.
@@ -827,7 +826,7 @@ end
 ---
 --- @param lang? string language to open the query editor for. If omitted, inferred from the current buffer's filetype.
 function M.edit(lang)
-  require('vim.treesitter.dev').edit_query(lang)
+  vim.treesitter.dev.edit_query(lang)
 end
 
 return M