DOC-252 Fix broken mermaid diagrams in docs

[neverett]

Why are the changes needed?

Closes #4864

What changes were proposed in this pull request?

• Update mermaid diagram format in conf.py
• Install Node.js and npm install -g @mermaid-js/mermaid-cli during build process

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

#5373

Docs link

TK

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.98%. Comparing base (bd2f9a8) to head (0cb167e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5467      +/-   ##
==========================================
- Coverage   61.93%   60.98%   -0.96%     
==========================================
  Files         611      793     +182     
  Lines       36463    51313   +14850     
==========================================
+ Hits        22582    31291    +8709     
- Misses      11907    17136    +5229     
- Partials     1974     2886     +912     

Flag	Coverage Δ
unittests-datacatalog	69.31% <ø> (ø)
unittests-flyteadmin	58.64% <ø> (?)
unittests-flytecopilot	17.79% <ø> (ø)
unittests-flytectl	67.97% <ø> (ø)
unittests-flyteidl	79.04% <ø> (ø)
unittests-flyteplugins	61.84% <ø> (ø)
unittests-flytepropeller	57.32% <ø> (ø)
unittests-flytestdlib	65.82% <ø> (ø)

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[davidmirror-ops]

Thank you!

[neverett]

@davidmirror-ops looks like docs tests are failing because the MMCloud plugin example page has a 404ing link. Here's a PR to remove and redirect the MMCloud plugin pages -- once it's merged, I can update the branch in this PR and the tests should pass.

[neverett]

@cosmicBboy I'm able to generate mermaid diagrams locally with the changes in this PR, but docs tests are failing with command '/home/docs/.asdf/shims/mmdc' cannot be run (needed for mermaid output), check the mermaid_cmd setting.

That is the location mmdc ends up installed in on the build server (see the readthedocs build logs), so I'm not sure what else to try -- any ideas?