style: enforce PRD typography, TOC, and dynamic Impeccable Skills UI upgrades

feat: enhance user journey analysis and modular detailed solution with focus sandbox

docs: update READMEs to reflect the 7-step detailed PRD process

feat: enforce detailed initial PRD and multi-round heuristic questioning

Enforce strictly step-by-step execution: Add explicit STOP instructions to prevent AI from rushing through the workflow without user confirmation

Fix workflow logic: Move requirement gathering BEFORE project initialization to prevent premature folder creation

Update workflow rules to explicitly define the PRD directory structure and standard chapters

Fix workflow Step 2: Ensure initial PRD is generated as HTML instead of Markdown

Update workflow rules to explicitly enforce bidirectional sync between prototype modifications and PRD detailed logic

Fix broken emoji in README

Update README to support universal AI IDEs (Cursor, Claude Code, etc.)

Update workflow to include PRD-Prototype sync and version management

Initial commit: Add Agile PM Workflow templates and skill