chore(Maintain): Fix .gitmodules formatting and add ignore directive

Reformat the Documentation/Rust submodule entry in .gitmodules to remove the incorrect indentation from the section header and add `ignore = all` to prevent submodule changes from appearing in git status. This keeps the Maintain workspace clean by ignoring local submodule modifications that don't need to be committed upstream.

Author: NikolaRHristov

.gitmodules

@@ -1,3 +1,4 @@
 [submodule "Documentation/Rust"]
-	path = Documentation/Rust
-	url = ssh://git@github.com/CodeEditorLand/RustDocumentationMaintainLand.git
+path = Documentation/Rust
+url = ssh://git@github.com/CodeEditorLand/RustDocumentationMaintainLand.git
+ignore = all