setup modules.jl

[aviatesk]

• bundles module-detection code into modules.jl
  • finding module files
  • auto-module detection
• add some basic tests for them

---

• Separated from WIP: rename refactor #203 for easier review
• Also prepares for [todo] refactor out auto module detection handlings Juno.jl#411

[aviatesk]

#209 needs to be merged in advance.

[codecov]

Codecov Report

Merging #210 into avi/betterutils will increase coverage by 0.47%.
The diff coverage is 85.57%.

@@                 Coverage Diff                 @@
##           avi/betterutils     #210      +/-   ##
===================================================
+ Coverage            39.62%   40.09%   +0.47%     
===================================================
  Files                   36       37       +1     
  Lines                 1845     1858      +13     
===================================================
+ Hits                   731      745      +14     
+ Misses                1114     1113       -1

Impacted Files	Coverage Δ
src/Atom.jl	100% <ø> (ø)	⬆️
src/goto.jl	80.79% <ø> (ø)	⬆️
src/utils.jl	86.2% <ø> (-5.26%)	⬇️
src/eval.jl	8.57% <ø> (+1.42%)	⬆️
src/comm.jl	31.25% <0%> (-0.67%)	⬇️
src/modules.jl	86.4% <86.4%> (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 28eb7ac...868a234. Read the comment docs.