fix: add Blueprint overrides for @types/react peer dep conflict

The @blueprintjs/* v4 packages declare peerOptional @types/react@"^16 || 17 || 18"
which conflicts with @types/react@19.x. Using $-reference overrides tells npm to
use the root project's version, resolving ERESOLVE.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Hyperkid123