Add gradleutils.displayName

Useful as an external property to store the display name so it can be
accessed in places other than the project or buildscript. Also, used for
optional features which can be enabled with a property flag.

Author: Jonathing

src/main/groovy/net/minecraftforge/gradleutils/GradleUtilsExtensionForProject.java

@@ -5,12 +5,21 @@
 package net.minecraftforge.gradleutils;
 
 import org.gradle.api.Action;
+import org.gradle.api.provider.Property;
 import org.gradle.api.publish.maven.MavenPublication;
 import org.gradle.api.tasks.TaskProvider;
 
 /// A subset of [GradleUtilsExtension] that is given to projects. Includes additional convenience methods that only
 /// apply to projects.
 public sealed interface GradleUtilsExtensionForProject extends GradleUtilsExtension permits GradleUtilsExtensionInternal.ForProject {
+    /// The display name for the project.
+    ///
+    /// If the relevant properties are enabled, it is used in areas such as the Javadoc window title, among other
+    /// things.
+    ///
+    /// @return The property for the display name
+    Property<String> getDisplayName();
+
     /// Promotes a publication to the <a href="https://files.minecraftforge.net">Forge Files Site</a>.
     ///
     /// Publications that are promoted will automatically have the relevant task added as a finalizer to the

src/main/groovy/net/minecraftforge/gradleutils/GradleUtilsExtensionImpl.groovy

@@ -125,13 +125,17 @@ import static net.minecraftforge.gradleutils.GradleUtilsPlugin.LOGGER
 
         private final Project project
 
+        final Property<String> displayName
+
         @Inject
         ForProjectImpl(Project project) {
             super(project)
             this.project = project
 
             this.problems = this.objects.newInstance(GradleUtilsProblems)
 
+            this.displayName = this.objects.property(String)
+
             project.tasks.register(GenerateActionsWorkflow.NAME, GenerateActionsWorkflowImpl)
 
             project.afterEvaluate { this.finish(it) }

src/main/groovy/net/minecraftforge/gradleutils/GradleUtilsProblems.java

@@ -26,7 +26,7 @@ void ghWorkflowGitVersionMissing(String taskName) {
                 The workflow file will likely be incomplete or be missing details that may cause it to fail.""".formatted(taskName))
             .severity(Severity.WARNING)
             .stackLocation()
-            .solution("Apply the Git Version Plugin (net.minecraftforge.gitversion) to your project.")
+            .solution("Apply the Git Version Gradle plugin (net.minecraftforge.gitversion) to your project.")
             .solution("If the Git Version plugin is applied, double check the Git Version Gradle plugin implementation.")
             .solution("Manually add in the necessary details to the generated workflow file.")
             .solution(HELP_MESSAGE));
@@ -41,7 +41,7 @@ RuntimeException pomUtilsGitVersionMissing(Exception e) {
                 If the Git Version plugin has not been applied, the URL must be manually specified as the second parameter.""")
             .severity(Severity.ERROR)
             .stackLocation()
-            .solution("Apply the Git Version Plugin (net.minecraftforge.gitversion) to your project.")
+            .solution("Apply the Git Version Gradle plugin (net.minecraftforge.gitversion) to your project.")
             .solution("Manually add the remote URL in `addRemoteDetails`.")
             .solution(HELP_MESSAGE));
     }