v1.5.0 — Comprehensive README

Complete rebuild of the README as a full product narrative — built to sell the methodology to anyone landing on the repo.

New sections:

• The problem it solves (why deals actually stall)
• The science — all 6 peer-reviewed studies with their numbers, plus a prospect-theory chart
• The 5-step Loss Aversion Gap Framework, diagrammed
• Full-system mind map of every mode, protocol, and doctrine
• Orchestrator routing flowchart + the 9 modes
• How a deal moves through Gapsi (discovery → review → close lifecycle map)
• 6 real-world scenarios + a worked one-deal example as a sequence diagram
• Results per call / per deal / per quarter
• Benefits → second-order benefits → compounding benefits, diagrammed
• Daily and weekly workflow integration with time-cost table
• Coaching philosophy, privacy model, who it's for (and who it's not)

9 Mermaid diagrams, all parse-validated against Mermaid v11 — they render natively on GitHub.

No functional changes to the skill, hook, or installer.