Migrate Neovim to lazy.nvim and update dotfiles

- Neovim:
    - Migrate from vim-plug to lazy.nvim.
    - Refactor config (`init.lua`, `config.vim`).
    - Replace Coq with blink.cmp, add CodeCompanion.
- Fish:
    - Add aliases (`cl`, `ai`), env vars (`ANDROID_HOME`, `PYENV`).
    - Update keybindings and conditional tool initialization (starship, zoxide, fzf, pyenv).
    - Refine ASDF/Homebrew setup.
- Git: Add aliases (`rs`, `rss`, `ap`).
- Other: Update SKHD bindings and WezTerm path/settings.

.config/fish/functions/define_aliases.fish

@@ -1,5 +1,6 @@
 function define_aliases -a uname -d 'Defines aliases for commonly used commands'
     alias q exit
+    alias cl clear
     alias rcp 'rsync -aP'
     alias vg vagrant
     alias tf terraform
@@ -15,6 +16,7 @@ function define_aliases -a uname -d 'Defines aliases for commonly used commands'
     alias pn pnpm
     alias nv 'neovide --fork; and clear'
     alias hx helix
+    alias ai aichat
 
     switch "$uname"
         case Linux