expose instantiation_error, type_error, and domain_error constructors.

[codecov[bot]]

Codecov Report

Base: 99.11% // Head: 99.23% // Increases project coverage by +0.12% :tada:

Coverage data is based on head (18d1302) compared to base (88e435d). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #281 +/- ## ========================================== + Coverage 99.11% 99.23% +0.12% ========================================== Files 23 23 Lines 7327 7346 +19 ========================================== + Hits 7262 7290 +28 + Misses 48 40 -8 + Partials 17 16 -1 ``` | [Impacted Files](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase) | Coverage Δ | | |---|---|---| | [engine/atom.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL2F0b20uZ28=) | `100.00% <ø> (ø)` | | | [engine/builtin.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL2J1aWx0aW4uZ28=) | `99.59% <100.00%> (+0.41%)` | :arrow_up: | | [engine/exception.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL2V4Y2VwdGlvbi5nbw==) | `100.00% <100.00%> (ø)` | | | [engine/iterator.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL2l0ZXJhdG9yLmdv) | `100.00% <100.00%> (ø)` | | | [engine/number.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL251bWJlci5nbw==) | `100.00% <100.00%> (ø)` | | | [engine/text.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL3RleHQuZ28=) | `100.00% <100.00%> (ø)` | | | [engine/vm.go](https://codecov.io/gh/ichiban/prolog/pull/281?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase#diff-ZW5naW5lL3ZtLmdv) | `88.36% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yutaka+Ichibangase)

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