Restore type checking

[sndrs]

20 temporarily disables type checking in tests and CI.

This captures what we need to do to restore breaking the build if type checks fail.

i.e. this has to go green and be merged before initial release 😉

• restores types
• breaks index out into smaller modules
• STILL doesn't provide intellisense autocompletion. this either requires more brainpower than i can muster or cannot be done. if cannot be done, is this whole approach the right one...?

[codecov[bot]]

Codecov Report

Merging #21 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #21   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           3      5    +2     
  Lines          45     41    -4     
  Branches        1      3    +2     
=====================================
- Hits           45     41    -4

Impacted Files	Coverage Δ
src/until.ts	100% <100%> (ø)
src/from.ts	100% <100%> (ø)
src/query.ts	100% <100%> (ø)
src/config.ts	100% <100%> (ø)	:arrow_up:
src/for.ts	100% <100%> (ø)