Add tools to make the notebook functional on Google Colab

Adding something like the following to the notebook cell should allow it to run in Google Colab, which is useful for demonstrations.

``` python
import sys
import os

# Check if we are in a Google Colab environment.
# This is a common heuristic to detect Colab.
IN_COLAB = 'google.colab' in sys.modules

if IN_COLAB:
print("Running in Google Colab environment.")
repo_name = "data_access_example"
repo_url = "https://github.com/slama0077/data_access_example"
branch_name = "Forcing"

# Define the target directory for cloning
# clone_dir = os.path.join(os.getcwd(), repo_name)
clone_dir = os.path.join("/", "content", repo_name)
# install the various dependencies
!pip install nwmurl
!pip install ngiab_data_preprocess
!pip install -r "/content/data_access_example/requirements.txt"

# If the directory already exists, remove it to ensure we get the correct branch
if os.path.exists(clone_dir):
print(f"Removing existing directory: {clone_dir}")
# Use !rm -rf for shell command execution in Colab
!rm -rf {clone_dir}

# Clone the specified branch of the repository
print(f"Cloning the '{branch_name}' branch of '{repo_url}' into '{clone_dir}'")
# Use !git clone for shell command execution in Colab
!git clone -b {branch_name} {repo_url} {clone_dir}

# Add the cloned repository path to sys.path
if clone_dir not in sys.path:
sys.path.insert(0, clone_dir)
print(f"Added '{clone_dir}' to Python path.")
else:
print(f"'{clone_dir}' is already in Python path.")
else:
print("Not running in Google Colab environment. Skipping repository cloning and path setup.")
```