fix: remove deprecated testnet configurations and update CLI documentation with new links

Author: DiRaiks

.github/workflows/publish-alpha.yml

@@ -9,7 +9,7 @@ permissions:
 
 jobs:
   pre-publish:
-    if: github.ref == 'refs/heads/develop' || github.ref == 'refs/heads/testnet-2' || github.ref == 'refs/heads/testnet-3'
+    if: github.ref == 'refs/heads/develop'
     uses: ./.github/workflows/publish-dry-run.yml
     secrets:
       NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: development
     # restricts job to develop branch
-    if: github.ref == 'refs/heads/develop' || github.ref == 'refs/heads/testnet-2' || github.ref == 'refs/heads/testnet-3'
+    if: github.ref == 'refs/heads/develop'
     steps:
       - name: Checkout repo
         uses: actions/checkout@v6