Measure performance with flamegraph

[ChristopherRabotin]

Effects

Only for monitoring and catching large changes in behavior.

The workflow should run only on the master branch and on request.

Closes #223

If this is a new feature or a bug fix ...

• [x] Yes, the branch I'm proposing to merge is called issue-xyz where xyz is the number of the issue.

If this change adds or modifies a validation case

• [x] No.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 3fce28a):

https://nyx-rustdoc--pr224-223-measure-performa-s0culfpi.web.app

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[ChristopherRabotin]

Preemptive merge so I can test this. I can't seem to dispatch the new workflow until it's on master for some reason, that's kind of frustrating...