v3.6.55

Changes

• GH#17207: tighten VoltAgent color palette doc — converted from bullet-list to table format for improved AI agent scannability
• Fixed version consistency across all version files (3.6.49 → 3.6.50 → 3.6.55)

Files Changed

• .agents/tools/design/library/brands/voltagent/02-color-palette.md — table format, all 22 color tokens preserved
• .agents/configs/simplification-state.json — updated hash
• Version files — bumped to 3.6.55