Many fixes and added a wasmer loader to bring in modules from wasmer.io

- Add coi-serviceworker to work around cross-origin problems with `SharedArrayBuffer`.
- Add Bash, jq, Python (disabled) and Ruby.
- Update tests because of changes in Puppeteer API.
- Add generalised `Runner` to replace directly using `Worker`s to allow the WASM runtime in the main browser window.
- Make `Base64` slightly less greedy when detecting input - still too greedy!
- Fix bug where highlighting was missing when changing languages.

TODO

@@ -9,13 +9,13 @@
 - [X] Add `Code` renderer to syntax highlight quines or other code output.
 - [X] Responsive view
 - [X] Fix the mime selector as that has some undesirable behaviour when editing at the moment.
+- [X] Add Ruby (https://runrb.io/)
 - [ ] Check a bunch of existing answers and fix what's broken
 - [ ] Verify `LICENSE`s before adding one here
 - [ ] Clean up the used `webperl` implementation (to make updating easier)
 - [ ] Add different versions of Perl (older versions supporting `?..?` in `s///`, literal `$^V`, etc)
 - [ ] Add PHP (https://github.com/oraoto/pib)
-- [ ] Add Ruby (https://runrb.io/)
-- [ ] Add Python (https://pyodide.org/)
+- [-] Add Python (https://pyodide.org/)
 - [ ] Add C#? (https://blazor.net/)
 - [ ] Maybe add bash via jslinux somehow? (https://bellard.org/jslinux/)
 - [ ] Accessibility (aria-label of all fields etc)