Both projects are sphinx_rtd_theme when rendering documentation.

This task is about performing minor adjustments to the TF-M documentation configuration to align as closely to the TF-A one, without moving the document files in the code-base.

• A logo image should be set.
• TF-M should be replaced with TrustedFirmare-M
• Main navigation menu items need to listed in order of logic progression and separated
• the html_theme_options should match.