Introduce a copy(M,p) and a copy(M, p, X) command

[kellertuer]

...to easily copy points and tangent vectors (recursively) into newly allocated memory.

[codecov]

Codecov Report

Merging #77 (ca1aee4) into master (516a43e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head ca1aee4 differs from pull request most recent head c534f94. Consider uploading reports for the commit c534f94 to get more accurate results

@@           Coverage Diff           @@
##           master      #77   +/-   ##
=======================================
  Coverage   99.84%   99.85%           
=======================================
  Files          14       14           
  Lines        1330     1338    +8     
=======================================
+ Hits         1328     1336    +8     
  Misses          2        2           

Impacted Files	Coverage Δ
src/ManifoldsBase.jl	99.14% <100.00%> (+0.06%)	⬆️

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[kellertuer]

Maybe the patch test was too early since the comment already contradicts this? However, tests cover the new code, we still only have two lines missing due to an macro-function codecov error, maybe the same as JuliaLang/julia#36283

[mateuszbaran]

Thanks for adding this 👍 .