ops: use requirements.txt instead of coeus

Deprecations:
  - This commit deprecates the use and install of coeus-sphinx-theme
    from GitHub and uses requirements.txt instead

Impact Analysis:
  - This ensures that Jupyter Lite and all the corresponding components
    are installed during the build and deployment stage.

Signed-off-by: Akshay Mestry <xa@mes3.dev>

.github/workflows/publish-dev-pages.yaml

@@ -54,14 +54,14 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PY_BUILD }}  # Sets up the Python version specified in the environment variables.
-          cache: 'pip'  # Caches pip dependencies to speed up subsequent builds.
+          cache: "pip"  # Caches pip dependencies to speed up subsequent builds.
 
       # Step 3: Install the project's Python dependencies.
       - name: Install Python Dependencies
         run: |
-          echo "Installing Coeus..."
+          echo "Installing Coeus and Jupyter Lite..."
           python -m pip install --upgrade pip
-          pip install -U git+https://github.com/xames3/coeus-sphinx-theme.git#egg=coeus-sphinx-theme
+          pip install -r requirements.txt
 
       # Step 4: Build the Sphinx documentation into HTML format.
       - name: Build Sphinx Documentation

.github/workflows/publish-feature-pages.yaml

@@ -57,14 +57,14 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PY_BUILD }}  # Sets up the Python version specified in the environment variables.
-          cache: 'pip'  # Caches pip dependencies to speed up subsequent builds.
+          cache: "pip"  # Caches pip dependencies to speed up subsequent builds.
 
       # Step 3: Install the project's Python dependencies.
       - name: Install Python Dependencies
         run: |
-          echo "Installing Coeus..."
+          echo "Installing Coeus and Jupyter Lite..."
           python -m pip install --upgrade pip
-          pip install -U git+https://github.com/xames3/coeus-sphinx-theme.git#egg=coeus-sphinx-theme
+          pip install -r requirements.txt
 
       # Step 4: Build the Sphinx documentation into HTML format.
       - name: Build Sphinx Documentation

.github/workflows/publish-main-pages.yaml

@@ -54,14 +54,14 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PY_BUILD }}  # Sets up the Python version specified in the environment variables.
-          cache: 'pip'  # Caches pip dependencies to speed up subsequent builds.
+          cache: "pip"  # Caches pip dependencies to speed up subsequent builds.
 
       # Step 3: Install the project's Python dependencies.
       - name: Install Python Dependencies
         run: |
-          echo "Installing Coeus..."
+          echo "Installing Coeus and Jupyter Lite..."
           python -m pip install --upgrade pip
-          pip install -U git+https://github.com/xames3/coeus-sphinx-theme.git#egg=coeus-sphinx-theme
+          pip install -r requirements.txt
 
       # Step 4: Build the Sphinx documentation into HTML format.
       - name: Build Sphinx Documentation