Add method to get Forge versions for specific Minecraft version (#5)

* Add method to get Forge versions for specific Minecraft version

A new public method, `GetForgeVersions`, has been added to the `ForgeInstaller.cs` class. This method returns the available Forge versions for a specific Minecraft version, improving the process of version management and installation.

* Disable ad display and update package references

The ad display function `showAd()` in `ForgeInstaller.cs` has been commented out to disable showing of ads. In addition, a package reference for "CmlLib.Core" in `CmlLib.Core.Installer.Forge.csproj` was removed and a new project reference to "CmlLib.Core.csproj" was added. This change will ensure the use of the most recent and relevant references.

* Revert "Disable ad display and update package references"

This reverts commit 9040df8.

Author: GamerVII-NET

CmlLib.Core.Installer.Forge/ForgeInstaller.cs

@@ -38,6 +38,11 @@ public async Task<string> Install(
         return await Install(bestVersion, options);
     }
 
+    public Task<IEnumerable<ForgeVersion>> GetForgeVersions(string mcVersion)
+    {
+        return _versionLoader.GetForgeVersions(mcVersion);
+    }
+
     public Task<string> Install(string mcVersion, string forgeVersion) =>
         Install(mcVersion, forgeVersion, new ForgeInstallOptions());
 
@@ -62,8 +67,8 @@ public async Task<string> Install(
             return installer.VersionName;
 
         var version = await checkAndDownloadVanillaVersion(
-            forgeVersion.MinecraftVersionName, 
-            options.FileProgress, 
+            forgeVersion.MinecraftVersionName,
+            options.FileProgress,
             options.ByteProgress);
 
         if (string.IsNullOrEmpty(options.JavaPath))
@@ -105,6 +110,7 @@ private string getJavaPath(IVersion version)
             javaPath = _launcher.GetDefaultJavaPath();
         if (string.IsNullOrEmpty(javaPath) || !File.Exists(javaPath))
             throw new InvalidOperationException("Cannot find any java binary. Set java binary path");
+
         return javaPath;
     }