feat(plugins): merge Skill management into plugins

electron/coding-runtime/pi/runtime.ts

@@ -165,13 +165,12 @@ interface PiRpcSessionStateProjection {
   sessionFile?: string;
 }
 
-function fallbackWorkerResources(skillIds: readonly string[]): ResolvedWorkerResources {
-  const effectiveSkillIds = [...new Set(skillIds.map((id) => id.trim()).filter(Boolean))];
+function fallbackWorkerResources(_skillIds: readonly string[]): ResolvedWorkerResources {
   return {
     catalogRevision: 0,
     pluginIds: [],
-    effectiveSkillIds,
-    skillEntries: effectiveSkillIds.map((id) => ({ id, entryPath: `${id}/SKILL.md` })),
+    effectiveSkillIds: [],
+    skillEntries: [],
     tools: [],
   };
 }