Generate static run-types for IDEs

[shyamd]

This PR switches the dynamic run type enum for static enums so IDE autocompletion and mypy checks work.

[codecov-io]

Codecov Report

Merging #141 (1b673de) into master (2e1fdbb) will increase coverage by 6.18%.
The diff coverage is 99.71%.

@@            Coverage Diff             @@
##           master     #141      +/-   ##
==========================================
+ Coverage   87.14%   93.33%   +6.18%     
==========================================
  Files          18       20       +2     
  Lines         677     1350     +673     
==========================================
+ Hits          590     1260     +670     
- Misses         87       90       +3     

Impacted Files	Coverage Δ
emmet-core/emmet/core/material.py	97.36% <ø> (-0.14%)	⬇️
emmet-core/emmet/core/structure.py	100.00% <ø> (ø)
emmet-core/emmet/core/vasp/validation.py	57.40% <ø> (-0.78%)	⬇️
emmet-core/emmet/core/vasp/calc_types/__init__.py	71.42% <71.42%> (ø)
emmet-core/emmet/core/symmetry.py	93.54% <100.00%> (ø)
emmet-core/emmet/core/utils.py	78.33% <100.00%> (+0.15%)	⬆️
emmet-core/emmet/core/vasp/calc_types/enums.py	100.00% <100.00%> (ø)
emmet-core/emmet/core/vasp/calc_types/utils.py	88.70% <100.00%> (ø)
emmet-core/emmet/core/vasp/task.py	98.50% <100.00%> (ø)
emmet-core/emmet/stubs/utils.py	53.52% <100.00%> (ø)
... and 5 more

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