refactor(claude-code-plugin-loader): split loader.ts into per-type loaders

Extract plugin component loading into dedicated modules:
- discovery.ts: plugin directory detection
- plugin-path-resolver.ts: path resolution logic
- agent-loader.ts, command-loader.ts, hook-loader.ts
- mcp-server-loader.ts, skill-loader.ts

src/features/claude-code-plugin-loader/hook-loader.ts

@@ -0,0 +1,26 @@
+import { existsSync, readFileSync } from "fs"
+import { log } from "../../shared/logger"
+import type { HooksConfig, LoadedPlugin } from "./types"
+import { resolvePluginPaths } from "./plugin-path-resolver"
+
+export function loadPluginHooksConfigs(plugins: LoadedPlugin[]): HooksConfig[] {
+  const configs: HooksConfig[] = []
+
+  for (const plugin of plugins) {
+    if (!plugin.hooksPath || !existsSync(plugin.hooksPath)) continue
+
+    try {
+      const content = readFileSync(plugin.hooksPath, "utf-8")
+      let config = JSON.parse(content) as HooksConfig
+
+      config = resolvePluginPaths(config, plugin.installPath)
+
+      configs.push(config)
+      log(`Loaded plugin hooks config from ${plugin.name}`, { path: plugin.hooksPath })
+    } catch (error) {
+      log(`Failed to load plugin hooks config: ${plugin.hooksPath}`, error)
+    }
+  }
+
+  return configs
+}