fix(api): populate lhsrawalt in nvim_get_keymap response

Problem:
The `nvim_get_keymap()` function is missing the `lhsrawalt` field in its response for mappings with an alternate key representation. This makes its return value inconsistent with its documented `maparg()`-like structure and its formal type definition.

Solution:
Corrects the `keymap_array` function to pass the alternate mapping keys (`current_maphash->m_alt->m_keys`) to `mapblock_fill_dict`. The argument responsible for this was previously hardcoded to `NULL`.

For example, for a mapping of `<C-x>`, the API will now correctly return both `lhsraw` (`<80><fc>^DX`) and `lhsrawalt` (the alternate form, e.g., `^X`).

0 files changed, 0 insertions, 0 deletions