docs(openclaw): document split roots and host-path remap defaults

[kalinon]

Summary

This PR updates OpenClaw documentation to match Path Law v2:

• single mounted config root
• main workspace as subdirectory
• canonical main virtual path /
• no /workspace alias

Changes

• Updated setup and deployment guidance to use:
  • CONFIG_ROOT=/openclaw-config
  • MAIN_WORKSPACE_DIR=workspace
  • single mount (~/.openclaw:/openclaw-config)
• Updated workspace-service reference docs:
  • filesystem layout and virtual path mapping
  • endpoint table corrections
  • troubleshooting language for CONFIG_ROOT
• Updated troubleshooting with explicit legacy-alias guidance:
  • PATH_NOT_ALLOWED when using /workspace/...
  • use / for main, /workspace-<agent> for sub-agents, /projects|/skills|/docs for shared
• Added virtual path conventions to getting-started configuration docs

Issues Solved

• Confusion around split mounts and compounded workspace pathing
• Misunderstanding of where main workspace should resolve
• Missing guidance for deprecated /workspace virtual alias behavior

Related PRs

• Workspace-service Path Law v2: refactor(openclaw): split workspace and config filesystem roots mosbot-workspace-service#2
• API alignment updates: feat(openclaw): normalize host paths for split-root workspace routing mosbot-api#7

Tracking issue:

• Refs OpenClaw pathing/mount mismatches across workspace service, API, and docs (tracking) mosbot-workspace-service#3

[kalinon]

Follow-up docs update for Path Law v2.

New commit: c0d7ebe

Highlights:

• setup/workspace-service/troubleshooting docs now use CONFIG_ROOT + MAIN_WORKSPACE_DIR
• single-mount examples (~/.openclaw:/openclaw-config)
• explicit guidance for canonical virtual paths and /workspace alias removal
• added virtual path conventions to getting-started configuration docs

[kalinon]

Superseded by #4 (#4), which rolls up all commits currently on moltar-forge:main relative to bymosbot:main.