Reorder Rule Priority Update

Reorder matching now uses first-match-wins priority.

• Rules are processed top to bottom.
• If a shader matches a rule, it is marked as matched.
• Later rules normally skip already-matched shaders.

Added support for the [!] prefix on reorder rules:

• A rule starting with [!] can still match shaders that were already matched earlier.
• This lets you intentionally override previous matches for specific cases.