feat(plugin): add plugin to easily save aliases and functions

plugins/fishysave/README.md

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+## fishysave
+
+Plugin to save and update functions and aliases directly from shell, reminiscent of the fish "funcsave" feature.
+
+## Install
+
+add fishysave to the plugins array of your zshrc file:
+```bash
+# ~/.zshrc
+plugins=(... fishysave)
+
+```
+
+## Usage
+
+```bash
+# Save an alias
+alias lsal="ls -al"
+fishysave lsal
+
+# Save a function
+function lsa() {
+    ls -al
+}
+fishysave lsa
+
+```

plugins/fishysave/fishysave.plugin.zsh

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+local base_dir="${ZSH_SAVE_DIR:-$HOME/.zshrc_fishy}"
+
+function fishysave() {
+  local name="$1"
+
+  local base_dir="${ZSH_SAVE_DIR:-$HOME/.zshrc_fishy}"
+  local alias_dir="$base_dir/aliases"
+  local func_dir="$base_dir/functions"
+  
+  if [[ -z "$name" ]]; then
+    echo "No parameter provided"
+    echo "Usage: save <alias or function>"
+    return 1
+  fi
+
+  if alias "$name" &>/dev/null; then
+    local alias_def
+    alias_def=$(alias "$name")
+
+    echo "alias $alias_def" > "$alias_dir/$name.zsh"
+    echo "Alias $name saved to $alias_dir/$name.zsh"
+  elif whence -w "$name" | grep -q function; then
+    local func_def
+    func_def=$(functions "$name")
+    echo "$func_def" > "$func_dir/$name.zsh"
+    echo "Function $name saved to $func_dir/$name.zsh"
+  else
+    echo "Couldn't find a declared function or alias named '$name'"
+    return 2
+  fi
+}
+
+mkdir -p "$base_dir/aliases" "$base_dir/functions"
+
+setopt localoptions nullglob
+
+for file in "$base_dir"/aliases/*.zsh "$base_dir"/functions/*.zsh; do
+  [[ -f $file ]] && source "$file"
+done