Minor conformers/xyz files fixes

[alongd]

• Save the conformers before/after opt files in the conformers folder
• Save species xyz file after opt (don't wait for "All converged")

[codecov]

Codecov Report

Merging #150 into master will decrease coverage by 0.01%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master     #150      +/-   ##
==========================================
- Coverage   45.58%   45.57%   -0.02%     
==========================================
  Files          28       28              
  Lines        7320     7320              
  Branches     1913     1913              
==========================================
- Hits         3337     3336       -1     
+ Misses       3504     3503       -1     
- Partials      479      481       +2

Impacted Files	Coverage Δ
arc/scheduler.py	16.13% <0%> (-0.08%)	⬇️
arc/plotter.py	36.67% <100%> (ø)	⬆️
arc/reaction.py	41.92% <0%> (ø)	⬆️

---

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[codecov]

Codecov Report

Merging #150 into master will decrease coverage by 0.73%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master     #150      +/-   ##
==========================================
- Coverage   45.58%   44.84%   -0.74%     
==========================================
  Files          28       28              
  Lines        7320     7320              
  Branches     1913     1913              
==========================================
- Hits         3337     3283      -54     
- Misses       3504     3569      +65     
+ Partials      479      468      -11

Impacted Files	Coverage Δ
arc/scheduler.py	15.68% <0%> (-0.53%)	⬇️
arc/plotter.py	28.57% <100%> (-8.11%)	⬇️
arc/species/conformers.py	75.3% <0%> (-0.61%)	⬇️
arc/reaction.py	41.92% <0%> (ø)	⬆️

---

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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