Added readme for devs

README.md

@@ -4,7 +4,9 @@ After cloning the repository, run the following commands to set up your developm
 
 ```bash
 python -m venv .venv
-source .venv/bin/activate  # On Windows use `.venv\Scripts\activate`
+source .venv/bin/activate
+# On Windows use `.venv\Scripts\activate`
+# On Windows with git bash use `source .venv/Scripts/activate`
 bash install.sh
 ```
 
@@ -13,4 +15,8 @@ Install cpl-cli as a development package:
 ```bash
 pip install -e src/core
 pip install -e src/cli
-```
+# test with:
+cpl v
+```
+
+When using Pycharm, mark all directories under `src/` as "Sources Root" and `exa` to ensure proper module resolution.