chore: release v0.8.0 - JIT Bypass Pattern

[koficodedat]

Summary

Release v0.8.0 with JIT Bypass Pattern - a major performance breakthrough.

Changes

• Update version from 0.7.5 to 0.8.0 (package.json, README badge)
• Add comprehensive CHANGELOG entry for v0.8.0
• Update README benchmarks with v0.8.0 results
• Add "Completed in v0.8.0" section to roadmap

v0.8.0 Highlights

JIT Bypass Pattern (Phases 8-11):

• Phase 8: JIT object validator bypass (5x improvement)
• Phase 9: JIT array validator bypass (6x faster than valibot)
• Phase 10: Recursive JIT bypass (20x faster)
• Phase 11: JIT bypass for unions, primitives, literals

Performance vs Valibot

Category	propval	valibot	Winner
Primitives (string)	66.60 ns	67.86 ns	propval 1.02x ✅
Simple Object	65.17 ns	201.08 ns	propval 3.09x ✅
Complex Nested	174.15 ns	932.64 ns	propval 5.36x ✅
Number Array [100]	112.40 ns	671.44 ns	propval 5.97x ✅
String Array [100]	157.38 ns	664.97 ns	propval 4.23x ✅
Union (3 types)	87.76 ns	83.37 ns	valibot 1.05x

Score: 6 wins, 1 near-tie (was 2 wins, 3 losses in v0.7.5)

Test Plan

• All 537 tests passing
• Tag v0.8.0 created and pushed