fix: resolve npm React peer dependency conflict

[JJordan0C]

Description

Fix npm dependency resolution for generated next-forge projects.

The workspaces pin React to 19.2.4, but packages with React and React DOM peer dependencies allow npm to select a newer react-dom release. That newer release requires the matching newer React version, producing an ERESOLVE conflict with the pinned React version.

This change adds a root react-dom override at 19.2.4, keeping the React pair aligned across every workspace.

Related Issues

Closes #753

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my code.
• Comments are not applicable to this manifest-only change.
• Documentation updates are not necessary.
• I validated the dependency-resolution fix end to end.
• New and existing tests pass locally.

Screenshots (if applicable)

Not applicable.

Validation

• bun install --frozen-lockfile --ignore-scripts
• bun run test
• bunx tsup
• Biome check across all 300 tracked files
• Reproduced the original npm ERESOLVE failure and verified the React conflict no longer occurs with the override

Additional Notes

After resolving this React conflict, npm currently reaches the separate OpenAI/Zod conflict tracked in #743 and #746. Applying that independent override during validation allowed npm install to complete successfully.

[vercel]

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