fix: resolve missing commands/ccs.md symlink during npm install (v4.3.9) (#18)

* fix: add missing commands/ccs.md symlink during npm install

Previously, the ClaudeSymlinkManager only created symlinks for the
commands/ccs directory and skills/ccs-delegation directory, but missed
the commands/ccs.md file. This resulted in an incomplete symlink structure
where users would see the ccs folder symlinked but not the ccs.md file.

Added commands/ccs.md to the ccsItems array to ensure all CCS components
are properly symlinked during installation.

Fixes: npm install now creates complete symlink structure for all CCS items

* chore: bump version to 4.3.9

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "4.3.8",
+  "version": "4.3.9",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",