PIPE-2738: Fix Sphinx image scaling errors in CLI docstrings
Replaced `:scale:` with `:width:` in `.. figure::` directives across 19 CLI task docstrings. This circumvents a known Sphinx/Pillow limitation where attempting to read original image files from disk for dynamic scaling fails with a `FileNotFoundError` when triggered from generated `autosummary` stubs. This resolves the image build warnings while retaining identical visual output in the HTML docs.
PIPE-2738: Convert Markdown tables to `list-table` directives in User Guide
Converted the standard Markdown tables in `pipeline-versions-and-documentation.md`, `pipeline-weblog.md`, and `weights.md` to Sphinx `{list-table}` directives. This ensures consistent table rendering and alignment across the Sphinx documentation, and enables the application of custom CSS classes (like `small-font-table`) to maintain a clean, compact visual style.
PIPE-2738: Apply drop-shadow to Markdown lightbox images
Extended the custom CSS drop-shadow styling in `custom_theme.css` to target `a[data-lightbox] img`. This ensures that screenshots embedded in MyST Markdown files (which use the Sphinx lightbox extension) receive the same consistent border and shadow effect as images embedded via standard Sphinx `.. figure::` directives.
