Fix for null resolveProvider in codeAction

The resolveProvider field doesn't need to be present even if the codeAction param is.

From the specification:

```
export interface CodeActionOptions extends WorkDoneProgressOptions {
	/**
	 * CodeActionKinds that this server may return.
	 *
	 * The list of kinds may be generic, such as `CodeActionKind.Refactor`,
	 * or the server may list out every specific kind they provide.
	 */
	codeActionKinds?: CodeActionKind[];

	/**
	 * The server provides support to resolve additional
	 * information for a code action.
	 *
	 * @SInCE 3.16.0
	 */
	resolveProvider?: boolean;
}
```

src/main/java/org/wso2/lsp4intellij/client/languageserver/requestmanager/DefaultRequestManager.java

@@ -737,6 +737,7 @@ private boolean checkCodeActionProvider(Either<Boolean, CodeActionOptions> provi
 
     private boolean checkCodeActionResolveProvider(Either<Boolean, CodeActionOptions> provider) {
         return provider != null && provider.isRight() && provider.getRight() != null
+                && provider.getRight().getResolveProvider() != null
                 && provider.getRight().getResolveProvider();
     }
 }