Optionally depend on server ydoc and docprovider (#21)

* Replace optional dependency on entire `jupyter-collaboration` package with only the packages which are needed

* Mention `[lab]` extras in readme

* Fix missing space

---------

Co-authored-by: Frédéric Collonval <[email protected]>

Author: krassowski

README.md

@@ -17,7 +17,13 @@ for the frontend extension.
 
 ## Install
 
-To install the extension, execute:
+To install the extension for use in JupyterLab or Notebook 7, execute:
+
+```bash
+pip install jupyter_server_nbmodel[lab]
+```
+
+For API-only use:
 
 ```bash
 pip install jupyter_server_nbmodel

pyproject.toml

@@ -29,8 +29,7 @@ dependencies = [
 dynamic = ["version", "description", "authors", "urls", "keywords"]
 
 [project.optional-dependencies]
-# FIXME we should be able to only use the server part without UI
-rtc = ["jupyterlab>=4.2.0", "jupyter_collaboration>=3.0.0b0"]
+lab = ["jupyterlab>=4.2.0", "jupyter-docprovider>=1.0.0b1", "jupyter-server-ydoc>=1.0.0b1"]
 test = ["pytest~=8.2", "pytest-cov", "pytest-jupyter[server]>=0.6", "pytest-timeout"]
 lint = ["mdformat>0.7", "mdformat-gfm>=0.3.5", "ruff>=0.4.0"]
 typing = ["mypy>=0.990"]