Add ToolExecBase#usingDirectly for direct URL downloads

Please don't use, marked as deprecated as such. This exists as a workaround for projects that are not published with proper metadata (Srg2Source).

If the need arises after ForgeDev 7 is finished, I can expand the Tool interfaces to account for direct download links.

Author: Jonathing

gradleutils-shared/src/main/java/net/minecraftforge/gradleutils/shared/ToolExecBase.java

@@ -176,6 +176,16 @@ public final void using(Dependency dependency) {
         );
     }
 
+    @Deprecated
+    public final void usingDirectly(CharSequence downloadUrl) {
+        var name = getName();
+        var url = getProviders().provider(downloadUrl::toString);
+        this.getClasspath().setFrom(getProviders().of(ToolImpl.Source.class, spec -> spec.parameters(parameters -> {
+            parameters.getInputFile().set(getProviders().zip(localCaches(), url, (d, s) -> d.file("tools/" + name + '/' + s.substring(s.lastIndexOf('/')))));
+            parameters.getDownloadUrl().set(url);
+        })));
+    }
+
     /// The enhanced problems instance to use for this task.
     ///
     /// @return The enhanced problems