add tanstack start example/template

[drew-harris]

Adds 3 new starter templates of increasing complexity:

• tanstack start: on par with the nextjs starter, includes todo list and presence
• tanstack-start-full: includes protected routes, login page, cookie sync, instant user middleware for server functions
• tanstack-start-with-tanstack-query: everything included with tanstack-start-full with full ssr setup using tanstack query to fetch on server and subscribe on client. includes isomorphic function to protect routes on the server and client

Also changed:
also removes the package-lock from the nextjs example project. Reason is that if you use pnpm overrides to use local packages, that will also add the override to the package.lock. The package-lock gets removed by create-instant-app anyway.

tanstack-start and tanstack-start-full added to create-instant-app

Operations with the instant-cli will work with these templates because they both use VITE_PUBLIC environment variables.

Review guide:

In the instant repo: cd examples/EXAMPLE-TO-TEST pnpm i instant-cli init pnpm run dev

and to test CIA: set the INSTANT_REPO_FOLDER env variable to the location of your instant repo and run CIA in dev mode with INSTANT_CLI_DEV

Testing examples with dev dependencies (not necessary for this pr)

create a pnpm-workspace.yaml file in the root of the example

overrides:
  "@instantdb/react": "file:../../client/packages/react"
  "@instantdb/react-common": "file:../../client/packages/react-common"
  "@instantdb/core": "file:../../client/packages/core"
  "@instantdb/admin": "file:../../client/packages/admin"
  "@instantdb/version": "file:../../client/packages/version"

When you change an @instantdb/package you must pnpm i in the example to copy the new code into node modules. The override copies from the monorepo folder instead of fetching the files from the web. There are no symlinks.

[github-actions]

View Vercel preview at instant-www-js-drewh-tanstack-start-jsv.vercel.app.

[drew-harris]

This PR depends on: #2229

[stopachka]

Def something weird going on at least when testing:

If I have www running, somehow this still overwrites the port

[drew-harris]

Also now having this issue, can't find a way to fix.
not even this picked up on it https://vite.dev/config/server-options#server-strictport

[stopachka]

May be nice to:
(a) make this look a little nicer
(b) add some small explanation. This demonstrate how to call the server

[stopachka]

nit: if this fails, there's no indication in the UI.

console shows "Uncaught (in promise) Error: Instant must be initialized with an appId."

Would be nice if we showed this error somehow, so folks could tell Claude etc.

[drew-harris]

Working on a general solution in #2243