feat(zsh): automatically expand aliases

Automatically expand aliases after the space key is pressed, unless it
was added using the `ialias` function.

This is something that I saw on Sebastian Daschner's videos
(https://www.sebastian-daschner.com,
https://www.youtube.com/@SebastianDaschnerIT) and is from his dotfiles
(https://github.com/sdaschner/dotfiles).

home-manager/modules/zsh.nix

@@ -36,6 +36,66 @@
 
       compdef g=git
 
+      clear-ls-all() {
+        clear
+        exa -al
+      }
+      zle -N clear-ls-all
+      bindkey '^K' clear-ls-all
+
+      clear-git-status() {
+        clear
+        git status -sb .
+      }
+      zle -N clear-git-status
+      bindkey '^G' clear-git-status
+
+      # auto-completes aliases
+      # enables to define
+      # - normal aliases (completed with trailing space)
+      # - blank aliases (completed without space)
+      # - ignored aliases (not completed)
+
+      # ignored aliases
+      typeset -a ialiases
+      ialiases=()
+
+      ialias() {
+        alias $@
+        args="$@"
+        args=''${args%%\=*}
+        ialiases+=(''${args##* })
+      }
+
+      # blank aliases
+      typeset -a baliases
+      baliases=()
+
+      balias() {
+        alias $@
+        args="$@"
+        args=''${args%%\=*}
+        baliases+=(''${args##* })
+      }
+
+      expand-alias-space() {
+        [[ $LBUFFER =~ "\<(''${(j:|:)baliases})\$" ]]; insertBlank=$?
+        if [[ ! $LBUFFER =~ "\<(''${(j:|:)ialiases})\$" ]]; then
+          zle _expand_alias
+        fi
+
+        zle self-insert
+
+        if [[ "$insertBlank" = "0" ]]; then
+          zle backward-delete-char
+        fi
+      }
+
+      zle -N expand-alias-space
+
+      bindkey " " expand-alias-space
+      bindkey -M isearch " " magic-space
+
       setopt auto_cd
       setopt auto_pushd
       setopt pushd_ignore_dups