Add action to mirror commits to codeberg

Author: Morwenn

.github/workflows/mirror-to-codeberg.yml

@@ -0,0 +1,25 @@
+# Copyright (c) 2025 Morwenn
+# SPDX-License-Identifier: MIT
+
+name: Mirror Commits to Codeberg
+
+on: [push, workflow_dispatch]
+
+jobs:
+  mirror-to-codeberg:
+    name: Mirror to Codeberg
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+
+      - name: Mirror
+        uses: yesolutions/[email protected]
+        with:
+          REMOTE: 'https://codeberg.org/Morwenn/cpp-sort.git'
+          GIT_USERNAME: Morwenn
+          GIT_PASSWORD: ${{ secrets.GIT_PASSWORD }}

docs/Miscellaneous-utilities.md

@@ -373,7 +373,7 @@ auto m = get<foo_tag>(mm);
 #include <cpp-sort/utility/quicksort_adversary.h>
 ```
 
-`utility::quicksort_adversary` is a function template that implements an algorithm described by M. D. McIlroy in [*A Killer Adversary for Quicksort*][quicksort-adversary], which attempts to trigger the quadratic case of many quicksort implementations by trying to guess the pivot and forcing the testing comparison to perform a certain set of comparisons.
+`utility::quicksort_adversary` is a function template that implements an algorithm described by M. D. McIlroy in [*A Killer Adversary for Quicksort*][quicksort-adversary], which attempts to trigger the quadratic case of many quicksort implementations by trying to guess the pivot and forcing the tested algorithm to perform a certain set of comparisons.
 
 ```cpp
 template<typename Sorter, typename Integer>