Standards checklist:

• The PR title is descriptive.
• The PR doesn't replicate another PR which is already open.
• I have read the contribution guide and followed all the instructions.
• The code follows the code style guide detailed in the wiki.
• The code is mine or it's from somewhere with an MIT-compatible license.
• The code is efficient, to the best of my ability, and does not waste computer resources.
• The code is stable and I have tested it myself, to the best of my abilities.
• If the code introduces new aliases, I provide a valid use case for all plugin users down below.

Changes:

• Add a new plugin named fishysave

Other comments:

Use case

I've migrated to zsh from fish, and one feature I've been missing is to think about a customization to my shell experience and implement it right away. I know I can alias lsal="ls -al >> ~/.zshrc but that doesnt cover the case in which I want to keep refining that addition to my shell, and it's unorganized too, because it all gets mixed up.
With this plugin I can create a complex shell alias or function, and in any other moment just update it, either using fishysave command again or even editing it on the function folder.
I've been using this for a little while as a custom plugin and I found it very pleasing for my usecase.