update developer guide & pdm.toml

docs/DEVELOPER_GUIDE.md

@@ -9,7 +9,7 @@ You can set up a local Python environment for development as follows:
 2. Install system dependencies
     - For MacOS: `brew install Cmake`
     - For Linux (Debian): `sudo apt-get install build-essential cmake`
-3. Run `pdm install -G all, dev` to install the Python dependencies. This will create a virtual environment in `eva/.venv`.
+3. Run `PDM_PYTHON=$(pyenv which python) && pdm install -G all -G dev` to install the Python dependencies. This will create a virtual environment in `eva/.venv`. If you don't use `pyenv` to manage your python installations, you can replace `$(pyenv which python)` with the path to your python executable.
 
 ## Adding new dependencies 
 

pdm.toml

@@ -1,2 +1,9 @@
 [install]
 cache_method = "symlink_individual"
+
+[python]
+use_venv = true
+use_pyenv = false
+
+[venv]
+with_pip = true