feat(docs): replace lua2dox.lua

Problem:

The documentation flow (`gen_vimdoc.py`) has several issues:
- it's not very versatile
- depends on doxygen
- doesn't work well with Lua code as it requires an awkward filter script to convert it into pseudo-C.
- The intermediate XML files and filters makes it too much like a rube goldberg machine.

Solution:

Re-implement the flow using Lua, LPEG and treesitter.

- `gen_vimdoc.py` is now replaced with `gen_vimdoc.lua` and replicates a portion of the logic.
- `lua2dox.lua` is gone!
- No more XML files.
- Doxygen is now longer used and instead we now use:
  - LPEG for comment parsing (see `scripts/luacats_grammar.lua` and `scripts/cdoc_grammar.lua`).
  - LPEG for C parsing (see `scripts/cdoc_parser.lua`)
  - Lua patterns for Lua parsing (see `scripts/luacats_parser.lua`).
  - Treesitter for Markdown parsing (see `scripts/text_utils.lua`).
- The generated `runtime/doc/*.mpack` files have been removed.
   - `scripts/gen_eval_files.lua` now instead uses `scripts/cdoc_parser.lua` directly.
- Text wrapping is implemented in `scripts/text_utils.lua` and appears to produce more consistent results (the main contributer to the diff of this change).

1 files changed, 12 insertions, 12 deletions

diff --git a/src/nvim/api/options.c b/src/nvim/api/options.c
index 7deadb8eb5..d9bc0ccc92 100644
--- a/src/nvim/api/options.c
+++ b/src/nvim/api/options.c
@@ -272,21 +272,21 @@ Dictionary nvim_get_all_options_info(Arena *arena, Error *err)
 /// Gets the option information for one option from arbitrary buffer or window
 ///
 /// Resulting dictionary has keys:
-///     - name: Name of the option (like 'filetype')
-///     - shortname: Shortened name of the option (like 'ft')
-///     - type: type of option ("string", "number" or "boolean")
-///     - default: The default value for the option
-///     - was_set: Whether the option was set.
+/// - name: Name of the option (like 'filetype')
+/// - shortname: Shortened name of the option (like 'ft')
+/// - type: type of option ("string", "number" or "boolean")
+/// - default: The default value for the option
+/// - was_set: Whether the option was set.
 ///
-///     - last_set_sid: Last set script id (if any)
-///     - last_set_linenr: line number where option was set
-///     - last_set_chan: Channel where option was set (0 for local)
+/// - last_set_sid: Last set script id (if any)
+/// - last_set_linenr: line number where option was set
+/// - last_set_chan: Channel where option was set (0 for local)
 ///
-///     - scope: one of "global", "win", or "buf"
-///     - global_local: whether win or buf option has a global value
+/// - scope: one of "global", "win", or "buf"
+/// - global_local: whether win or buf option has a global value
 ///
-///     - commalist: List of comma separated values
-///     - flaglist: List of single char flags
+/// - commalist: List of comma separated values
+/// - flaglist: List of single char flags
 ///
 /// When {scope} is not provided, the last set information applies to the local
 /// value in the current buffer or window if it is available, otherwise the