feat: improve UX for ccs doctor and sync commands (#13)

* feat: enhance UX for 'ccs sync' and 'ccs doctor' commands

- Add ora spinners for real-time progress feedback
- Add cli-table3 for structured health check summary table
- Display detailed component information in doctor report
- Show file/directory counts during sync operations
- Improve visual hierarchy and readability
- Fix Unicode checkmark violation (replaced with [OK])

Breaking changes: None
Dependencies added: ora@^5.4.1, cli-table3@^0.6.5

Version bumped to 4.3.0

* fix: match doctor summary header width to table width

* feat: improve settings validation to check API keys, not just endpoints

- Check if API keys are configured or still placeholders
- Show 'Key configured' vs 'Placeholder key (not configured)'
- Previous message 'Valid (API: api.z.ai)' was misleading
- Now users can clearly see which profiles need API key configuration
- Warnings shown for placeholder keys (yellow [!])

* feat: add category grouping and alignment to doctor checks

- Group checks into logical categories: System, Configuration, Profiles & Delegation, System Health
- Add consistent padding (26 chars) for aligned columns
- Add 2-space indent for better visual hierarchy
- Separate categories with blank lines for better readability
- Much cleaner and easier to scan than before

* fix: perfect alignment for all doctor check output

- Use .padEnd(26) consistently for all component names
- Remove extra space before status icons
- Now all status icons [OK]/[X]/[!]/[i] align perfectly
- All component names pad to exactly 26 characters

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "4.2.0",
+  "version": "4.3.0",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",
@@ -57,6 +57,10 @@
     "prepare": "node scripts/check-executables.js",
     "postinstall": "node scripts/postinstall.js"
   },
+  "dependencies": {
+    "cli-table3": "^0.6.5",
+    "ora": "^5.4.1"
+  },
   "devDependencies": {
     "mocha": "^11.7.5"
   }