feat(install): add support for clean installation (#259)

Signed-off-by: DiegoRamil <nxquumodding@gmail.com>

.github/workflows/pmg-e2e.yml

@@ -265,6 +265,15 @@ jobs:
           test -f bun.lock
           test -d node_modules/express
           test -d node_modules/lodash
+
+          echo "Testing Bun frozen manifest installation with bun ci..."
+          rm -rf node_modules
+          pmg --proxy-mode=false bun ci
+
+          # Verification: bun lockfile and modules exist after frozen manifest install
+          test -f bun.lock
+          test -d node_modules/express
+          test -d node_modules/lodash
           cd .. && rm -rf bun-test
 
       - name: Test Yarn - Single Package & Manifest

packagemanager/npm.go

@@ -48,7 +48,7 @@ func DefaultPnpmPackageManagerConfig() NpmPackageManagerConfig {
 
 func DefaultBunPackageManagerConfig() NpmPackageManagerConfig {
 	return NpmPackageManagerConfig{
-		InstallCommands: []string{"install", "i", "add"},
+		InstallCommands: []string{"install", "i", "add", "ci"},
 		NonDownloadCommands: []string{
 			// Removal
 			"remove", "rm",

packagemanager/npm_test.go

@@ -413,6 +413,26 @@ func TestBunParseCommand(t *testing.T) {
 				assert.Equal(t, 0, len(parsedCommand.InstallTargets))
 			},
 		},
+		{
+			name:    "manifest installation with short form",
+			command: "bun i",
+			assert: func(t *testing.T, parsedCommand *ParsedCommand, err error) {
+				assert.NoError(t, err)
+				assert.Equal(t, true, parsedCommand.IsManifestInstall)
+				assert.Equal(t, 0, len(parsedCommand.InstallTargets))
+				assert.True(t, parsedCommand.IsInstallationCommand())
+			},
+		},
+		{
+			name:    "manifest installation with ci",
+			command: "bun ci",
+			assert: func(t *testing.T, parsedCommand *ParsedCommand, err error) {
+				assert.NoError(t, err)
+				assert.Equal(t, true, parsedCommand.IsManifestInstall)
+				assert.Equal(t, 0, len(parsedCommand.InstallTargets))
+				assert.True(t, parsedCommand.IsInstallationCommand())
+			},
+		},
 		{
 			name:    "multiple package installations",
 			command: "bun add @types/node @types/react",
@@ -475,6 +495,13 @@ func TestNpmProxyBehavior(t *testing.T) {
 			isKnownNonDownloadCmd: false,
 			isInstallationCommand: false,
 		},
+		{
+			name:                  "bun ci — manifest install",
+			pm:                    func() (*npmPackageManager, error) { return NewNpmPackageManager(DefaultBunPackageManagerConfig()) },
+			command:               "bun ci",
+			isKnownNonDownloadCmd: false,
+			isInstallationCommand: true,
+		},
 		{
 			name:                  "npm exec — proxy runs (may download and run package)",
 			pm:                    func() (*npmPackageManager, error) { return NewNpmPackageManager(DefaultNpmPackageManagerConfig()) },