Also update the type annotation of TSNode:id(), which returns a string,
not an integer.

Co-authored-by: Wansmer <wansmer@gmail.com>
Co-authored-by: Andrew Voynov <andrewvoynov.b@gmail.com>
Co-authored-by: David Moberg <david.moberg@mediatek.com>

Problem:
With incremental injection parsing, injected languages' parsers parse
only the relevant regions and stores the result in _trees with the index
of the corresponding region. Therefore, there can be holes in _trees.

Solution:
* Use generic table functions where appropriate.
* Fix type annotations and docs.

According to `:h TSNode` docs, there's also `TSNode:sexpr()` and
`TSNode:has_error()` that is part of `TSNode` class, but this wasn't
documented in `treesitter/_meta.lua`.

Adding missing fields in so the types is similar to `:h TSNode`

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.

- Add bindings to Treesitter ts_parser_set_logger and ts_parser_logger
- Add logfile with path STDPATH('log')/treesitter.c
- Rework existing LanguageTree loggin to use logfile
- Begin implementing log levels for vim.g.__ts_debug

- Begin using `@package` in place of `@private` for functions
that are accessed internally but outside their defined class.

- Rename Node -> TSP.Node