v0.7.0

Accessibility and focus-management parity with @lexical/react 0.47.

Highlights:

• Vue adapters for ARIA live regions, focus manager, focus trap, and roving tab index
• experimental Lexical node slot refs
• reactive Vue options with lifecycle-safe cleanup and iframe support
• real-browser focus-trap coverage
• interactive accessibility controls in the Vue SPA example
• 100% statement, function, and line coverage