feat: add bottles-opener

CLAUDE.md

@@ -0,0 +1,23 @@
+# CLAUDE.md
+
+## Style
+
+Keep everything short — replies, explanations, comments, docs.
+
+## Commits
+
+- English only.
+- Conventional Commits prefix: `feat:`, `fix:`, `chore:`, `docs:`, `refactor:`, `ci:`, `build:`.
+- Subject as short as possible. Imperative, lowercase, no trailing period.
+- Body only when something genuinely cannot be inferred from the diff.
+- Never add `Co-Authored-By`, "Generated with" or any other AI attribution to commits or PR descriptions.
+
+## Testing
+
+Never test against the real setup: `enable` and `apply` rewrite the user's file associations.
+
+- `scripts/sandbox.sh <command>` runs the checkout with every XDG dir in a throwaway sandbox. It
+  reads the real bottles, writes nothing outside the sandbox and leaves the watcher off.
+- `BO_DRY_RUN=1 scripts/sandbox.sh open <launcher> <file>` prints the launch command instead of
+  starting the program. Launcher ids are in the sandbox's `state/bottles-opener/launchers`.
+- `make check` after every change. New strings: `make pot`, then translate them in `po/de.po`.