DOC: improve accessibility of the contributor guide flowchart #866
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Description
Currently, lines in the contributor guide flowchart are almost invisible when using dark mode. This PR improves their visibility by configuring
themeVariablesas described in the Mermaid docs. I also added some non-breaking spaces to the link labels for better padding around the text.Since this is a minor change, I went ahead with the PR without creating an issue. So feel free to close this if it doesn’t align with the current priorities 😃
Tests and Documentation
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