docs: clarify plugin pairing guidance

docs: remove stale mcphub runtime wording

chore: bump unreal mcphub version

refactor: link mcphub as a library

fix: make bundled release portable

docs: trim powershell fallback wording

docs: move powershell guidance into skill refs

feat: simplify unreal mcphub tools

docs: clarify synced tool inspection

docs: simplify user-facing guidance

docs: add powershell usage guide

refactor: simplify discovery strategies and startup checks

docs: refresh unreal mcphub cli guidance

fix: harden windows cli execution

Refresh distributed skill and CLI docs