feat(agent): add Hermes support

[eduardojvieira]

Closes #569

• Bug fix (type:bug)
• New feature (type:feature)
• Documentation only (type:docs)
• Code refactoring (type:refactor)
• Maintenance/tooling (type:chore)
• Breaking change (type:breaking-change)

Summary

• Added native support for Hermes coding agent
• Registered Hermes in factory and TUI catalog
• Documented Hermes ecosystem paths

Changes Table

File	Change
internal/agents/hermes/adapter.go	Added Hermes Adapter implementation
internal/catalog/agents.go	Added Hermes to TUI and CLI list
internal/cli/validate.go	Validated Hermes flag
internal/tui/model.go	Added Hermes detection UI mapping
docs/agents.md	Updated capability matrix

Test Plan

• Scripts run without errors: shellcheck scripts/*.sh
• Manually tested the affected functionality
• Skills load correctly in target agent

Contributor Checklist

• Linked an approved issue
• Added exactly one type:* label
• Ran shellcheck on modified scripts
• Skills tested in at least one agent
• Docs updated if behavior changed
• Conventional commit format
• No Co-Authored-By trailers