new features

[MMajidi137]

• simplify options
• ac option
• pf native options
• edit documentation

[codecov]

Codecov Report

Merging #70 (a3ac6f0) into main (0ccb4d5) will decrease coverage by 2.61%.
The diff coverage is 72.22%.

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
- Coverage   91.77%   89.15%   -2.62%     
==========================================
  Files           6        6              
  Lines         158      166       +8     
==========================================
+ Hits          145      148       +3     
- Misses         13       18       +5     

Impacted Files	Coverage Δ
src/input/tools.jl	85.18% <20.00%> (-14.82%)	⬇️
src/models/call_powermodels.jl	96.66% <91.66%> (-1.58%)	⬇️
src/models/vd.jl	92.30% <100.00%> (ø)

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