pyproject: create new notebook deps group

Remaining dev dependencies are notebook related, so converted to a group.

Author: dlech

poetry.lock

@@ -45,12 +45,12 @@ packaging = "^22"
 typing-extensions = "^4.3.0"
 reactivex = "^4.0.4"
 
-[tool.poetry.dev-dependencies]
+[tool.poetry.group.notebook.dependencies]
 ipykernel = "^5.3.1"
 ipywidgets = "^7.6.3"
 nbstripout = "^0.3.8"
 notebook = "^6.0.3"
-pybricks = {version = "3.0.0rc1", allow-prereleases = true}
+pybricks = {version = "^3", allow-prereleases = true}
 
 [tool.poetry.group.lint.dependencies]
 black = "^23"