Minor fixes for migrating webpack to esbuild during a v2 upgrade

bridgetown-core/.rubocop.yml

@@ -43,3 +43,6 @@ Style/OpenStructUse:
 Style/StringConcatenation:
   Exclude:
     - test/test_apply_command.rb
+
+Style/MixinGrouping:
+  Enabled: false

bridgetown-core/lib/bridgetown-core/commands/concerns/actions.rb

@@ -116,6 +116,10 @@ def add_npm_package(package_details)
         run "#{Bridgetown::PluginManager.package_manager} #{Bridgetown::PluginManager.package_manager_install_command} #{package_details}" # rubocop:disable Layout
       end
 
+      def remove_npm_package(package_details)
+        run "#{Bridgetown::PluginManager.package_manager} #{Bridgetown::PluginManager.package_manager_uninstall_command} #{package_details}" # rubocop:disable Layout
+      end
+
       def apply_from_url(url)
         apply transform_automation_url(url.dup)
       end

bridgetown-core/lib/bridgetown-core/commands/esbuild.rb

@@ -3,7 +3,7 @@
 module Bridgetown
   module Commands
     class Esbuild < Thor::Group
-      include Thor::Actions
+      include Thor::Actions, Bridgetown::Commands::Actions
       extend Summarizable
 
       Registrations.register do

bridgetown-core/lib/bridgetown-core/commands/esbuild/migrate-from-webpack.rb

@@ -25,7 +25,7 @@
     confirm = ask "\nThe following packages will be removed: \n\n#{packages_to_remove.join("\n")}\n\nWould you like to continue? [Yn]"
     return unless confirm.casecmp?("Y")
 
-    run "yarn remove #{packages_to_remove.join(" ")}"
+    remove_npm_package packages_to_remove.join(" ")
   end
 end
 

bridgetown-core/lib/bridgetown-core/plugin_manager.rb

@@ -81,12 +81,12 @@ def self.require_gem(name)
     end
 
     def self.package_manager
-      @package_manager ||= if File.exist?("package-lock.json")
-                             "npm"
-                           elsif File.exist?("yarn.lock")
+      @package_manager ||= if File.exist?("yarn.lock")
                              "yarn"
                            elsif File.exist?("pnpm-lock.yaml")
                              "pnpm"
+                           elsif File.exist?("package.json")
+                             "npm"
                            else
                              ""
                            end
@@ -96,6 +96,10 @@ def self.package_manager_install_command
       package_manager == "npm" ? "install" : "add"
     end
 
+    def self.package_manager_uninstall_command
+      package_manager == "npm" ? "uninstall" : "remove"
+    end
+
     # rubocop:disable Metrics/PerceivedComplexity, Metrics/CyclomaticComplexity
 
     # Iterates through loaded gems and finds npm-add gemspec metadata.