Release v0.8.0

[HartBrook]

Summary

• Update changelog for v0.8.0 release covering all changes since v0.7.0

Features in this release

• Path-scoped rules - Contextual Claude Code guidelines scoped by file path glob patterns (Add path-scoped rules feature #20)
• Multi-source configuration - Pull configs from multiple GitHub repositories (Add multi-source configuration support #21)
• Skills feature - Parameterized, reusable workflows with Agent Skills standard support (Add skills feature with code quality improvements #22)
• Integration test framework - Declarative YAML-based end-to-end test harness (Add integration test framework #16)

Test plan

• Verify changelog formatting renders correctly
• Confirm all PR references are accurate
• Tag v0.8.0 after merge