Rename package to FeatureTransforms

[glennmoy]

Following the discussion in JuliaRegistries/General#30630 (comment)

I opted for FeatureTransforms.jl to conceptually align the package name with the Transform type we've already implemented.

[codecov]

Codecov Report

Merging #33 (9d3000f) into main (6c43de4) will decrease coverage by 1.20%.
The diff coverage is 93.33%.

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
- Coverage   95.79%   94.59%   -1.21%     
==========================================
  Files           9        9              
  Lines         119      111       -8     
==========================================
- Hits          114      105       -9     
- Misses          5        6       +1     

Impacted Files	Coverage Δ
src/utils.jl	37.50% <75.00%> (+37.50%)	⬆️
src/FeatureTransforms.jl	100.00% <100.00%> (ø)
src/linear_combination.jl	100.00% <100.00%> (ø)
src/one_hot_encoding.jl	100.00% <100.00%> (ø)
src/transformers.jl	100.00% <100.00%> (ø)
src/scaling.jl	96.15% <0.00%> (-0.52%)	⬇️
src/power.jl	100.00% <0.00%> (ø)
src/periodic.jl	100.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 973c4e1...55a4cb2. Read the comment docs.