Add `Snacks.keymap.set()` and `Snacks.keymap.del()` as enhanced alternatives
to `vim.keymap.set/del` with support for:
- **Filetype-specific keymaps**: Set keymaps that only apply to buffers with
specific filetypes using the `ft` option
- **LSP-aware keymaps**: Set keymaps based on LSP client capabilities using
the `lsp` option (leverages Snacks.util.lsp)
- **Automatic application**: Keymaps are applied to existing buffers and
automatically set up for new buffers via FileType autocmd
Drop-in replacement API with smart defaults (silent by default).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
