feat(client): client copied from telegram-bot repo

[JumpLink]

This is in preparation for API tests, and it's also good to have the client part of the repository so that its codebase does not become orphaned.

• Copied client package from telegram-bot repo
• Upgarde Deno to 2.1.1
• Removed .github/workflows/common-check.yml since its scripts (and the client scripts) are also run with yarn check and yarn test
• check.yml adapted so that all tests are also executed in it
• I have removed the browser export from the package.json in the client and in common again. The browser build is bundled and therefore works without dependencies, but if you use a package.json, you are most likely using something that can resolve dependencies and then ESM is the better choice anyway.

[wpf500]

Why is this change necessary?

[JumpLink]

I think this was due to deno because it also stored the package.json packages in the node_modules folder. Should no longer be necessary with the removal of deno

[wpf500]

This is related to this vuejs/language-tools#5020, I'll leave the temporary fix in for now.

[wpf500]

I'm just leaving comments here for reference, I will merge this PR regardless. However I think I will remove the extra steps in the check action as it feels a bit excessive in terms of energy usage. To discuss at a later date

[wpf500]

I fixed the Express problem. I think it's because a new version of Express was released recently and some of the @type dependencies were bound to * rather than ^4, so they upgraded themselves to incompatible types