Add zoxide extension

[oxysoft]

Summary

• Native zoxide integration for fuzzy directory jumping on Linux
• Uses Vicinae's built-in fuzzy filter via List.Item.keywords — each directory entry carries the full path, every segment, and adjacent segment pairs, so typing any fragment of any parent directory matches naturally
• Configurable program actions: terminal (autodetected), editor, file manager, plus 5 user-defined program slots with ctrl+1..5 shortcuts
• Add/remove directories from zoxide's database inline

Why not port the Raycast extension?

The upstream raycast-zoxide pipes results through fzf --exact and relies on macOS-specific features (Finder, Spotlight, AppleScript). The fzf layer fights Vicinae's native fuzzy — title-only matching means parent-directory fragments never hit. This is a clean rewrite that drops fzf entirely and uses keywords for full-path fuzzy matching.

Requirements

• zoxide installed and on PATH
• A terminal emulator (autodetected: kitty, alacritty, wezterm, foot, ghostty, gnome-terminal, konsole, xterm)

Test plan

• npm install && npx vici lint passes
• npx vici build installs to ~/.local/share/vicinae/extensions/zoxide/
• Search Directories command shows zoxide entries with scores
• Typing a parent-directory fragment fuzzy-matches correctly
• Enter opens terminal in selected directory
• ctrl+e opens editor, ctrl+f opens file manager
• ctrl+x removes entry from zoxide, ctrl+c copies path
• Add Directory command with path argument adds to zoxide