Docs: Add sphinxcontrib-mermaid for diagram migration
Add sphinxcontrib-mermaid alongside existing blockdiag/seqdiag
extensions to prepare for migrating live diagrams from blockdiag
to Mermaid syntax.
The blockdiag/seqdiag extensions are abandoned and incompatible
with modern Python. The live diagram content in this repository
will be migrated to Mermaid syntax in a follow-up change, after
which blockdiag/seqdiag can be removed.
Issue-ID: CIMAN-33
Change-Id: I3819bb108563eef146b1fbe62d9c684c42c087e6
Signed-off-by: Claude <noreply@anthropic.com>
Signed-off-by: Matthew Watkins <mwatkins@linuxfoundation.org>