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/config.fish

@@ -11,9 +11,6 @@ function configure_fish
     import_sources $uname
     define_aliases $uname
     ssh_agent_startup
-    starship init fish | source
-    zoxide init fish | source
-    fzf --fish | source
 end
 
 configure_fish

.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

.config/fish/functions/define_global_variables.fish

@@ -21,7 +21,13 @@ function define_global_variables -d 'Defines all and exclusively globally export
 
     set -gx LIBVIRT_DEFAULT_URI 'qemu:///system'
 
-    set -gx ANDROID_HOME $HOME/Android/Sdk
+    if test (uname) = "Darwin"
+        set -gx ANDROID_HOME $HOME/Library/Android/Sdk
+    else
+        set -gx ANDROID_HOME $HOME/Android/Sdk
+    end
+
+    set -gx PYENV_ROOT $HOME/.pyenv
 
     fish_add_path $GOBIN \
         $HOME/.local/bin \
@@ -31,6 +37,7 @@ function define_global_variables -d 'Defines all and exclusively globally export
         $HOME/.cargo/bin \
         $HOME/.dotnet/tools \
         $BUN_INSTALL/bin \
+        $PYENV_ROOT/bin \
         $ANDROID_HOME/emulator \
         $ANDROID_HOME/platform-tools
 end

.config/fish/functions/fish_user_key_bindings.fish

@@ -1,12 +1,12 @@
 function fish_user_key_bindings
     bind --mode insert jj "if commandline -P; commandline -f cancel; else; set fish_bind_mode default; commandline -f backward-char repaint-mode; end"
-    bind --mode insert ,a 'ssh_add; commandline -f repaint'
-    bind --mode insert ,p 'nvim +"Telescope git_files"; commandline -f repaint'
-    bind --mode insert ,f 'nvim +"Telescope find_files"; commandline -f repaint'
-    bind --mode insert ,n 'nvim .; commandline -f repaint'
-    bind --mode insert ,s 'sysz; commandline -f repaint'
-    bind --mode insert ,z 'zi; commandline -f repaint'
-    bind --mode insert ,t 'fzf-file-widget'
-    bind --mode insert ,r 'fzf-history-widget'
-    bind --mode insert ,c 'fzf-cd-widget'
+    bind --mode insert comma,a 'ssh_add; commandline -f repaint'
+    bind --mode insert comma,p 'nvim +"Telescope git_files"; commandline -f repaint'
+    bind --mode insert comma,f 'nvim +"Telescope find_files"; commandline -f repaint'
+    bind --mode insert comma,n 'nvim .; commandline -f repaint'
+    bind --mode insert comma,s 'sysz; commandline -f repaint'
+    bind --mode insert comma,z 'zi; commandline -f repaint'
+    bind --mode insert comma,t 'fzf-file-widget'
+    bind --mode insert comma,r 'fzf-history-widget'
+    bind --mode insert comma,c 'fzf-cd-widget'
 end

.config/fish/functions/import_sources.fish

@@ -1,10 +1,27 @@
 function import_sources -a uname -d 'Loads any additional fish files needed at init.'
     test -f ~/.asdf/plugins/dotnet-core/set-dotnet-home.fish; and source ~/.asdf/plugins/dotnet-core/set-dotnet-home.fish
 
-    test -e ~/.asdf/asdf.fish
-    and source ~/.asdf/asdf.fish
-    and mkdir -p ~/.config/fish/completions
-    and ln -sf ~/.asdf/completions/asdf.fish ~/.config/fish/completions
+    # ASDF configuration code
+    if test -z $ASDF_DATA_DIR
+        set _asdf_shims "$HOME/.asdf/shims"
+    else
+        set _asdf_shims "$ASDF_DATA_DIR/shims"
+    end
+
+    # Do not use fish_add_path (added in Fish 3.2) because it
+    # potentially changes the order of items in PATH
+    if not contains $_asdf_shims $PATH
+        set -gx --prepend PATH $_asdf_shims
+    end
+    set --erase _asdf_shims
+
+    test -e /opt/homebrew/bin/brew
+    and /opt/homebrew/bin/brew shellenv | source -
+
+    command -q starship; and starship init fish | source
+    command -q zoxide; and zoxide init fish | source
+    command -q fzf; and fzf --fish | source
+    command -q pyenv; and pyenv init - | source
 
     # The next line updates PATH for the Google Cloud SDK.
     # if test -f '/Users/m/Documents/google-cloud-sdk/path.fish.inc'; source '/Users/m/Documents/google-cloud-sdk/path.fish.inc'; end