Add Fennel programming language as an alternative (#1195)

### Description of Changes

This PR adds Fennel as an alternative programming language that has an explictly anti-AI stance. Do note that while the project has an [AGENTS.md file](https://git.sr.ht/~technomancy/fennel/tree/main/item/AGENTS.md), it's put there explicitly to thwart and discourage coding assistants from generating code for that repo.

### Other links:
* [Language website](https://fennel-lang.org/)
* [Fennel Code of Conduct](https://fennel-lang.org/coc)

Reviewed-on: https://codeberg.org/ethical-foss/open-slopware/pulls/1195

README.md

@@ -1541,6 +1541,7 @@ This is a section for repos that are similar to this one either because they are
 > * [Cone](https://cone.jondgoodwin.com) - fast, friendly, safe, and fit systems programming language (dormant)
 > * [CSpydr](https://github.com/Spydr06/CSpydr) - static typed low-level compiled programming language inspired by Rust and C
 > * [eC](https://ec-lang.org) - expressive and intuitive, C style Object-Oriented programming language
+> * [Fennel](https://fennel-lang.org/) [![Anti-AI Policy](./badges/anti-ai-policy.svg)](#anti-ai-policy) ([1](https://git.sr.ht/~technomancy/fennel/tree/main/CONTRIBUTING.md#contribution-transparency)) - lisp that compiles to Lua
 > * [Idris] [![Anti-AI Policy](./badges/anti-ai-policy.svg)](#anti-ai-policy) ([1](https://github.com/idris-lang/Idris2/blob/main/CONTRIBUTING.md#things-we-will-not-accept)) - purely functional programming language, similar to Haskell
 > * [Hare](https://harelang.org) - systems programming language designed to be simple, stable, and robust
 > * [Inko](https://inko-lang.org) - language for building concurrent software with confidence