uSync.Forms: dependabot and forward port

Repo: Jumoo/uSync.Forms

Merged the vite bumps for both clients on v17 (#78, #79)
Merged v17 forward to v18 (#80): nightly-feed PAT comment, dependabot config aligned with the jumoo-context template. v18's TypeScript went back from ^6.0.3 to ^5.9.3, per the TypeScript 5 pin