feat(plugins): merge Skill management into plugins

shared/coding-skills.ts

@@ -1,24 +1,2 @@
-/** Skills that are part of Makelore's core coding runtime. */
-export const CORE_CODING_SKILL_IDS = [
-  'agent-browser',
-  'frontend-slides',
-  'grilling',
-  'planning-with-files',
-] as const;
-
-/**
- * Compatibility name for callers that enumerate skills built into the app.
- * Plugin skills intentionally do not appear here; their package definitions
- * are the source of truth.
- */
-export const BUNDLED_CODING_SKILL_IDS = CORE_CODING_SKILL_IDS;
-
-export type BundledCodingSkillId = (typeof BUNDLED_CODING_SKILL_IDS)[number];
-export type PluginCodingSkillId = string;
-export type CodingSkillId = BundledCodingSkillId | PluginCodingSkillId;
-
-export const DEFAULT_PROJECT_AGENT_SKILL_IDS = [
-  'agent-browser',
-  'grilling',
-  'planning-with-files',
-] as const satisfies readonly BundledCodingSkillId[];
+/** Public assignment key supplied by a Plugin or an installed device package. */
+export type CodingSkillId = string;