Add m3gnet support to Atomate2

[matthewkuner]

Summary

• Add M3GNet support from the matgl repository to Atomate2 forcefields.

Additional dependencies introduced

• matgl

Notes

• I do not plan to add support for MEGNet (as it seems to be inferior to M3GNet according to matbench discovery). Let me know if MEGNet has considerable demand too.

[matthewkuner]

I made a new from_m3gnet_result method in the ForceFieldTaskDoc. Currently, this is practically identical to the from_chgnet_result method; however, it does make it easier to adjust the methods in the future if they diverge.

[Andrew-S-Rosen]

That was fast!!!

[matthewkuner]

That was fast!!!

Kinda yes and kinda no. Most of this was honestly just copying and pasting from the CHGNet support. Not quite done yet either--seems like Matgl is in a state of flux right now, so I may let this sit for a bit

[utf]

Thanks @matthewkuner.

It looks like the logic for turning the m3gnet output into the task document is almost exactly the same? Can you put the common parts into an external function?

[codecov]

Codecov Report

Merging #380 (5fd2a91) into main (2f54128) will increase coverage by 0.06%.
The diff coverage is 90.47%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #380      +/-   ##
==========================================
+ Coverage   64.74%   64.81%   +0.06%     
==========================================
  Files          74       74              
  Lines        7157     7196      +39     
  Branches      938      946       +8     
==========================================
+ Hits         4634     4664      +30     
- Misses       2224     2233       +9     
  Partials      299      299              

Impacted Files	Coverage Δ
src/atomate2/vasp/jobs/elastic.py	78.31% <ø> (ø)
src/atomate2/forcefields/schemas.py	94.28% <83.33%> (-2.54%)	⬇️
src/atomate2/forcefields/jobs.py	89.83% <92.59%> (+1.95%)	⬆️
src/atomate2/common/schemas/elastic.py	88.65% <100.00%> (+0.11%)	⬆️
src/atomate2/vasp/flows/elastic.py	82.50% <100.00%> (+0.44%)	⬆️

... and 2 files with indirect coverage changes

[matthewkuner]

@utf this should be ready for review / merging. Let me know if the modified ForceFieldTaskDocument is satisfactory

[utf]

This looks perfect. Thank you.

[JaGeo]

Closes #379