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, 2 insertions, 0 deletions

diff --git a/runtime/lua/vim/keymap.lua b/runtime/lua/vim/keymap.lua
index 8e4e123fe0..84e9b4197d 100644
--- a/runtime/lua/vim/keymap.lua
+++ b/runtime/lua/vim/keymap.lua
@@ -90,6 +90,8 @@ end
 --- vim.keymap.del({'n', 'i', 'v'}, '<leader>w', { buffer = 5 })
 --- ```
 ---
+---@param modes string|string[]
+---@param lhs string
 ---@param opts table|nil A table of optional arguments:
 ---                      - "buffer": (integer|boolean) Remove a mapping from the given buffer.
 ---                        When `0` or `true`, use the current buffer.