openclaw: convert make-plan and do-plan commands to skills (#1070)

Move the /make-plan and /do orchestrator commands from plugin/commands/
into OpenClaw skills (openclaw/skills/make-plan, openclaw/skills/do-plan).

Skills are auto-discovered by the agent and loaded on-demand via SKILL.md
frontmatter matching, reducing context cost vs always-loaded slash commands.

Register skill directories in openclaw.plugin.json via the skills array.

Co-authored-by: Alex Newman <alexnewman@Alexs-Mac-mini.local>

openclaw/openclaw.plugin.json

@@ -6,6 +6,7 @@
   "version": "1.0.0",
   "author": "thedotmack",
   "homepage": "https://claude-mem.com",
+  "skills": ["skills/make-plan", "skills/do-plan"],
   "configSchema": {
     "type": "object",
     "additionalProperties": false,