Add arc deployment contributions to arc extension (#11032)

* Add arc deployment contributions to arc extension

* Add logo image

* update images

* Update strings

extensions/arc/src/test/README.md

@@ -0,0 +1,21 @@
+# Tests for deploying Arc resources via Jupyter notebook
+
+## Prerequisites
+- Python >= 3.6
+- Pip package manager
+- Azdata CLI installed and logged into an Arc controller
+
+## Running the tests
+### 1. (Optional, recommended) Create and activate a Python virtual environment
+- `python -m venv env`
+- `source env/bin/activate` (Linux)
+- `env\Scripts\activate.bat` (Windows)
+
+### 2. Upgrade pip
+- `pip install --upgrade pip`
+
+### 3. Install the dependencies
+- `pip install -r requirements.txt`
+
+### 4. Run the tests
+- `pytest`