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
+
+```