Add types and methods for participants onboarding module (#12)

Part of [laconicd testnet validator enrollment](https://www.notion.so/laconicd-testnet-validator-enrollment-6fc1d3cafcc64fef8c5ed3affa27c675)

Co-authored-by: Isha Venikar <145848618+IshaVenikar@users.noreply.github.com>
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Reviewed-on: cerc-io/registry-sdk#12
Co-authored-by: Nabarun <nabarun@deepstacksoft.com>
Co-committed-by: Nabarun <nabarun@deepstacksoft.com>

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v3
         with:
           path: "./laconicd/"
-          repository: cerc-io/laconicd
+          repository: cerc-io/laconic2d
           fetch-depth: 0
           ref: main
       - name: Environment
@@ -51,3 +51,12 @@ jobs:
       - name: Run nameservice expiry tests
         working-directory: laconicd/tests/sdk_tests
         run: ./run-tests.sh test:nameservice-expiry
+      
+      - name: Start containers (onboarding enabled)
+        working-directory: laconicd/tests/sdk_tests
+        env:
+          ONBOARDING_ENABLED: true
+        run: docker compose up -d
+      - name: Run participants onboarding tests
+        working-directory: laconicd/tests/sdk_tests
+        run: ./run-tests.sh test:onboarding