v0.1.5: fix: rename "LLM workflow" to "agentic workflow" (#156)

What's New

• Rich execution summary — agac run now renders a structured post-execution tree showing per-action status, type badges, provider, and latency
• Configurable seed data path — set seed_data_path in agent_actions.yml to rename your seed data directory
• Unified agac docs command — replaces separate docs generate + docs serve with a single command
• Cleaner CLI output — demoted 14x "fallback heuristic" spam and other noise to debug level

Fixes

• Place example READMEs where docs scanner expects them (README tab now works)
• Correct pass rate calculation and surface failed runs in logs
• Rebuild frontend to remove stale qanalabs references
• Remove dead ephemeral field from codebase
• Path traversal validation on seed_data_path config values
• LSP resolver now respects custom seed_data_path

DX Improvements

• agac init now scaffolds seed_data/ directory with config defaults
• Proper singular/plural in CLI messages ("1 Tool" not "1 Tools")
• Homepage stats polish and redesigned run detail view