docs: ✅ init cypress test e2e

Signed-off-by: jffarge <jf@dagger.io>

website/cypress/fixtures/bad_credential.json

@@ -0,0 +1,4 @@
+{
+  "message": "Bad credentials",
+  "documentation_url": "https://docs.github.com/rest"
+}

website/cypress/fixtures/bad_verification.code.json

@@ -0,0 +1,5 @@
+{
+  "error":"bad_verification_code",
+  "error_description":"The code passed is incorrect or expired.",
+  "error_uri":"https://docs.github.com/apps/managing-oauth-apps/troubleshooting-oauth-app-access-token-request-errors/#bad-verification-code"
+}