[ci] Move workflows to .forgejo (#3808)

Primarily to prevent mirrors from trying to run bogus actions.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3808

.github/workflows/strings.yml

@@ -1,22 +0,0 @@
-name: Check Strings
-
-on:
-  push:
-    branches: [ master ]
-
-jobs:
-  check-strings:
-    runs-on: source
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Find Unused Strings
-        run: ./tools/unused-strings.sh
-
-      - name: Find Stale Translations
-        run: ./tools/stale-translations.sh
-
-      - name: Diff
-        run: git --no-pager diff --exit-code HEAD