feat(treesitter)!: incremental injection parsing

Problem:

Treesitter highlighting is slow for large files with lots of injections.

Solution:

Only parse injections we are going to render during a redraw cycle.

---

- `LanguageTree:parse()` will no longer parse injections by default and
  now requires an explicit range argument to be passed.

- `TSHighlighter` now parses injections incrementally during on_win
  callbacks for the line range being rendered.

- Plugins which require certain injections to be parsed must run
  `parser:parse({ start_row, end_row })` before using the tree.

runtime/lua/vim/treesitter/dev.lua

@@ -99,7 +99,7 @@ function TSTreeView:new(bufnr, lang)
   -- For each child tree (injected language), find the root of the tree and locate the node within
   -- the primary tree that contains that root. Add a mapping from the node in the primary tree to
   -- the root in the child tree to the {injections} table.
-  local root = parser:parse()[1]:root()
+  local root = parser:parse(true)[1]:root()
   local injections = {} ---@type table<integer,table>
   parser:for_each_child(function(child, lang_)
     child:for_each_tree(function(tree)