replaced all deadlinks with wayback links

[jfdev001]

This PR address issue #1142

Replaced dead links that provided information about the finite elements with the corresponding wayback links. This is still not ideal since in some cases, the wayback machine did not archive a related URL (e.g., the definition for the basis functions for the 1st order BubbleEnrichedLagrange on a triangular element is not accessible: https://web.archive.org/web/20250000000000*/https://defelement.com/elements/examples/triangle-bubble-enriched-lagrange-1.html).

A possible solution that I plan on trying this week is to add to src/interpolations.jl permalinks to the files from https://github.com/DefElement/DefElement that provide information on the interpolation definitions but whose HTML pages are not archived by the wayback machine. The DefElement files that provide this interpolation information should be findable in the commit history of https://github.com/DefElement/DefElement. The PR should remain in draft mode until this can be resolved.

[KnutAM]

Thanks!

It seems like all the shape functions are missing from defelement? Not just the 3rd order quadrilaterals? I cannot see them neither on computer nor phone...

Then I think we should fix it upstream if it isn't just a single interpolation. Could be related to DefElement/DefElement#382? But I don't know how their website is built, so not sure...

Do you want to open at issue at defelement? (If not, I can do of course)

[jfdev001]

Correct! The shape functions are missing from defelement in general. This appears to be the case for more than just the 3rd order lagrange on quadrilaterals. The wayback links show you the shape functions, so it's a temporary fix.

I have opened an issue now at https://github.com/DefElement/DefElement

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.59%. Comparing base (1807f66) to head (dee57d2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1143   +/-   ##
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  Coverage   93.59%   93.59%           
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  Files          39       39           
  Lines        6087     6087           
=======================================
  Hits         5697     5697           
  Misses        390      390           

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[KnutAM]

Just validated that the links contain the correct information, with the change below, it should be good to go IMO.