refactor(core): split index.ts and config-handler.ts into focused modules

Main entry point:
- create-hooks.ts, create-tools.ts, create-managers.ts
- plugin-interface.ts: plugin interface types
- plugin/ directory: plugin lifecycle modules

Config handler:
- agent-config-handler.ts, command-config-handler.ts
- tool-config-handler.ts, mcp-config-handler.ts
- provider-config-handler.ts, category-config-resolver.ts
- agent-priority-order.ts, prometheus-agent-config-builder.ts
- plugin-components-loader.ts

src/plugin/hooks/create-core-hooks.ts

@@ -0,0 +1,42 @@
+import type { HookName, OhMyOpenCodeConfig } from "../../config"
+import type { PluginContext } from "../types"
+
+import { createSessionHooks } from "./create-session-hooks"
+import { createToolGuardHooks } from "./create-tool-guard-hooks"
+import { createTransformHooks } from "./create-transform-hooks"
+
+export function createCoreHooks(args: {
+  ctx: PluginContext
+  pluginConfig: OhMyOpenCodeConfig
+  isHookEnabled: (hookName: HookName) => boolean
+  safeHookEnabled: boolean
+}) {
+  const { ctx, pluginConfig, isHookEnabled, safeHookEnabled } = args
+
+  const session = createSessionHooks({
+    ctx,
+    pluginConfig,
+    isHookEnabled,
+    safeHookEnabled,
+  })
+
+  const tool = createToolGuardHooks({
+    ctx,
+    pluginConfig,
+    isHookEnabled,
+    safeHookEnabled,
+  })
+
+  const transform = createTransformHooks({
+    ctx,
+    pluginConfig,
+    isHookEnabled: (name) => isHookEnabled(name as HookName),
+    safeHookEnabled,
+  })
+
+  return {
+    ...session,
+    ...tool,
+    ...transform,
+  }
+}