fix: clean up tests directory structure

- Remove old test files that were moved to native/ subdirectories
- Clean install-test.sh, install-test.ps1, uninstall-test.sh, uninstall-test.ps1, test-custom-claude-path.ps1
- Tests now properly organized: native/, npm/, shared/, unit/, integration/
- Maintains clean root test directory with only orchestrators and docs

tests/npm/cli.test.js

@@ -42,10 +42,10 @@ describe('npm CLI', () => {
     });
 
     it('handles flag -p with value', function() {
-      this.timeout(5000);
+      this.timeout(10000);
 
       try {
-        execSync(`node "${ccsPath}" -p "test prompt"`, { stdio: 'pipe' });
+        execSync(`node "${ccsPath}" -p "test prompt"`, { stdio: 'pipe', timeout: 8000 });
       } catch (e) {
         const output = e.stderr?.toString() || e.stdout?.toString() || '';
         assert(!output.includes("Profile '-p' not found"), 'Should not treat -p as profile');