chore(all): add ethereum-rlp as a dependency

pyproject.toml

@@ -44,12 +44,13 @@ dependencies = [
     "pyyaml>=6.0.2,<7",
     "types-pyyaml>=6.0.12.20240917,<7",
     "pytest-json-report>=1.5.0,<2",
-    # TODO: bump questionary to a newer release, when it becomes available. 
+    # TODO: bump questionary to a newer release, when it becomes available.
     # The current release questionary 2.0.1 requires `prompt_toolkit = ">=2.0,<=3.0.36"`.
     # This conflicts with ipython; while not an EEST dependency, ipython a very useful tool:
     # https://ethereum.github.io/execution-spec-tests/main/dev/interactive_usage/
     "questionary @ git+https://github.com/tmbo/questionary@ff22aeae1cd9c1c734f14329934e349bec7873bc",
-    "prompt_toolkit>=3.0.48,<4",  # ensure we have a new enough version for ipython
+    "prompt_toolkit>=3.0.48,<4", # ensure we have a new enough version for ipython
+    "ethereum-rlp==0.1.3",
 ]
 
 [project.urls]
@@ -119,4 +120,4 @@ ignore = ["D205", "D203", "D212", "D415", "C901"]
 
 [tool.mypy]
 mypy_path = ["src", "$MYPY_CONFIG_FILE_DIR/stubs"]
-plugins = ["pydantic.mypy"]
+plugins = ["pydantic.mypy"]