build(ci): Migrate precommit hook from nvmsdkman to mise for (#34214)

[spbolton]

Description

Replace nvm/sdkman with mise for consistent Node.js, Java, and Yarn version management. Integrated lint-staged for precise file-level linting and formatting, replacing custom nx affected logic. Resolves ENOBUFS resource exhaustion issues in Git hook contexts.

Key Changes

• Added .mise.toml configuration for automatic tool version management
• Migrated pre-commit hook to use mise for Java/Node/Yarn execution
• Integrated lint-staged for efficient staged-file-only processing
• Replaced custom backup/restore logic with lint-staged's built-in git stash
• Fixed ENOBUFS errors by unsetting problematic Git environment variables
• Optimized Maven execution: validation for non-REST changes, compile only for REST API changes

Testing Completed

• ✅ Maven uses correct Java version from mise (21.0.8)
• ✅ Non-REST Java files trigger fast validation only (~5s)
• ✅ REST API files trigger compile with OpenAPI regeneration (~2min)
• ✅ pom.xml changes trigger Maven validation
• ✅ Frontend files auto-formatted and auto-fixed by lint-staged
• ✅ Only staged files processed (not entire 30-project monorepo)
• ✅ Automatic backup/restore of unstaged changes

Changes

• [List the main changes made]

Testing

• [Describe testing approach]

Closes #34214

Issue: Migrate precommit hook from nvmsdkman to mise for