feat(treesitter): allow disabling captures and patterns on TSQuery (#32790)

Problem: Cannot disable individual captures and patterns in treesitter queries.

Solution: 
* Expose the corresponding tree-sitter API functions for `TSQuery` object. 
* Add documentation for `TSQuery`.
* Return the pattern ID from `get_captures_at_pos()` (and hence `:Inspect!`).

src/gen/gen_vimdoc.lua

@@ -328,10 +328,12 @@ local config = {
       'treesitter.lua',
       'language.lua',
       'query.lua',
+      'tsquery.lua',
       'highlighter.lua',
       'languagetree.lua',
       'dev.lua',
     },
+    append_only = { 'tsquery.lua' },
     files = {
       'runtime/lua/vim/treesitter/_meta/',
       'runtime/lua/vim/treesitter.lua',