Enable submodule checkout in CI workflow and remove 3rdparty from gitignore

- Configure rust.yml workflow to checkout submodules during CI runs
- Remove /3rdparty from .gitignore to track the erc-8004-contracts submodule

Author: gitctrlx

.github/workflows/rust.yml

@@ -11,4 +11,6 @@ env:
 
 jobs:
   call-ci:
-    uses: qntx/workflows/.github/workflows/rust.yml@main
+    uses: qntx/workflows/.github/workflows/rust.yml@main
+    with:
+      submodules: true

.gitignore

@@ -20,4 +20,3 @@ target
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
-/3rdparty