Module

[ichiban]

#292

This PR implements a SICStus style module system.

[codecov]

Codecov Report

Attention: Patch coverage is 66.47196% with 287 lines in your changes missing coverage. Please review.

Project coverage is 95.65%. Comparing base (c682cd3) to head (9673e7f).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
engine/builtin.go	69.27%	106 Missing ⚠️
engine/text.go	58.33%	88 Missing and 7 partials ⚠️
engine/module.go	3.38%	57 Missing ⚠️
engine/vm.go	70.73%	11 Missing and 1 partial ⚠️
engine/clause.go	61.90%	7 Missing and 1 partial ⚠️
engine/term.go	82.60%	4 Missing ⚠️
interpreter.go	96.42%	2 Missing and 2 partials ⚠️
engine/parser.go	96.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #295      +/-   ##
==========================================
- Coverage   99.21%   95.65%   -3.57%     
==========================================
  Files          23       24       +1     
  Lines        7272     7777     +505     
==========================================
+ Hits         7215     7439     +224     
- Misses         51      321     +270     
- Partials        6       17      +11     

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[ichiban]

This PR lacks the concept of type-in module #292 (comment)

#307 has type-in module and is preferable.