Unifies TypeScript packages and command names

[cloutiertyler]

Description of Changes

This PR:

• standardizes the prettier config across all TypeScript projects
• adds a root level package.json
• standardizes all pnpm commands to be the same
• updates documentation accordingly
• adds some additional typescript testing for serialization and deserialization

IMPORTANT! Once this PR merges we will need to change the compile-and-test required check to build-and-test

API and ABI breaking changes

No breaking changes.

Expected complexity level and risk

2 - It in principle doesn't change any code, but could affect deploy processes.

Testing

• Just the automated testing that we had previously
• I added additional automated tests

[bfops]

FYI I believe this job name is used in the required status checks, so we will have to update the required name after this merges

[bfops]

Can you add that note into the PR description somewhere so it's a bit easier to remember?

[cloutiertyler]

Ah okay, yes I can

[bfops]

If these docs tweaks are important to you, can you please move them into a separate PR? They seem entirely unrelated to the (meaningfully large) actual goal of this PR.

[bfops]

I typically do something like:

git checkout -b new-branch origin/master
git checkout old-branch -- file1 file2 ...
git commit -am 'Moving files from other thing'
git push -u
gh pr create --web

[bfops]

Ah is this because we started running pnpm format on the docs? That definitely seems like a separate change, since the docs are entirely unrelated to our TypeScript bindings/SDK.

By default I would instead lean towards adding the docs to .prettierignore.

[cloutiertyler]

Yes, this is because I'm running the same pnpm format on all typescript directories (directories with package.json). I can exempt markdown from the formatting and add that in a separate PR if you'd like.

[cloutiertyler]

I do think that eventually we should have docs under prettier so that we don't have non-substantive formatting changes to the docs causing diffs in the future.

[cloutiertyler]

I've added **/*.md to the docs .prettierignore. Notably the cli-reference.md file formatting is still changed because I moved the not portable sed scripts into a node js script which rewrites the file with remark.

[cloutiertyler]

This script replaces the non-portable sed commands that were used to fix up the markdown.

[bfops]

Approving the docs formatting + CI changes, with the caveat that I think none of them should actually be happening in this PR (because I don't see the docs directory as a typescript project, or at the very least not the same kind of typescript project as the ones that are related to actual SpacetimeDB implementation). But if I close my eyes and pretend that this PR is only making those changes, they seem good to me.

[JulienLavocat]

Should a formatting step really be done during build?

Suggested change

	"build": "tsc --project ./tsconfig.json && pnpm fix-markdown && prettier --write docs/nav.js",
	"build": "tsc --project ./tsconfig.json && pnpm fix-markdown",