refactor: Replace TypeScript bootstrap with bash dependency checks

Simplified dependency installation by moving from TypeScript runtime bootstrap to bash-based checks in plugin manifest. This reduces complexity and code size while maintaining the same functionality.

Changes:
- Added bash conditional dependency checks to all 5 hooks in hooks.json
- Check runs before each hook: [ ! -d "${CLAUDE_PLUGIN_ROOT}/scripts/node_modules" ] && cd "${CLAUDE_PLUGIN_ROOT}/scripts" && npm install || true
- Reverted all hook TypeScript files to use simple static imports (removed dynamic imports)
- Removed src/shared/bootstrap.ts (44 lines)
- Removed ensureDependencies() calls from all hook entry points

Benefits:
- Simpler architecture using native bash instead of TypeScript
- Net reduction of 157 lines of code
- No runtime overhead when dependencies already installed
- Uses plugin manifest's command hook feature as intended
- Faster and more efficient

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

plugin/hooks/hooks.json

@@ -4,6 +4,11 @@
     "SessionStart": [
       {
         "hooks": [
+          {
+            "type": "command",
+            "command": "[ ! -d \"${CLAUDE_PLUGIN_ROOT}/scripts/node_modules\" ] && cd \"${CLAUDE_PLUGIN_ROOT}/scripts\" && npm install || true",
+            "timeout": 60000
+          },
           {
             "type": "command",
             "command": "node ${CLAUDE_PLUGIN_ROOT}/scripts/context-hook.js",
@@ -15,6 +20,11 @@
     "UserPromptSubmit": [
       {
         "hooks": [
+          {
+            "type": "command",
+            "command": "[ ! -d \"${CLAUDE_PLUGIN_ROOT}/scripts/node_modules\" ] && cd \"${CLAUDE_PLUGIN_ROOT}/scripts\" && npm install || true",
+            "timeout": 60000
+          },
           {
             "type": "command",
             "command": "node ${CLAUDE_PLUGIN_ROOT}/scripts/new-hook.js",
@@ -27,6 +37,11 @@
       {
         "matcher": "*",
         "hooks": [
+          {
+            "type": "command",
+            "command": "[ ! -d \"${CLAUDE_PLUGIN_ROOT}/scripts/node_modules\" ] && cd \"${CLAUDE_PLUGIN_ROOT}/scripts\" && npm install || true",
+            "timeout": 60000
+          },
           {
             "type": "command",
             "command": "node ${CLAUDE_PLUGIN_ROOT}/scripts/save-hook.js",
@@ -38,6 +53,11 @@
     "Stop": [
       {
         "hooks": [
+          {
+            "type": "command",
+            "command": "[ ! -d \"${CLAUDE_PLUGIN_ROOT}/scripts/node_modules\" ] && cd \"${CLAUDE_PLUGIN_ROOT}/scripts\" && npm install || true",
+            "timeout": 60000
+          },
           {
             "type": "command",
             "command": "node ${CLAUDE_PLUGIN_ROOT}/scripts/summary-hook.js",
@@ -49,6 +69,11 @@
     "SessionEnd": [
       {
         "hooks": [
+          {
+            "type": "command",
+            "command": "[ ! -d \"${CLAUDE_PLUGIN_ROOT}/scripts/node_modules\" ] && cd \"${CLAUDE_PLUGIN_ROOT}/scripts\" && npm install || true",
+            "timeout": 60000
+          },
           {
             "type": "command",
             "command": "node ${CLAUDE_PLUGIN_ROOT}/scripts/cleanup-hook.js",