chore: github action to auto update tanstack dependencies

[Sheraff]

Fixes #472

This PR was 100% AI generated by Claude Sonnet 4, based on the following prompt:

We need a github action workflow that updates @tanstack/* libraries

• easy to run
  • on workflow_dispatch
  • on cron schedule
• checkout this repo
• install pnpm
• run pnpm up "@tanstack/*" --latest
• if the git status --porcelain . is clean, stop here
• install node
• run pnpm lint
• run pnpm build
• if everything passes commit changes to main

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