Moves lang.eval sources back to partiql-lang

[johnedquinn]

Relevant Issues

• None

Description

• Moves lang.eval sources back to partiql-lang
• I ran: git reset db1c85b0fcfccdf6e9c8069e45d48525cc81e947 -- partiql-lang/
• Then, I deleted partiql-eval/src/main/kotlin/org.partiql.lang, partiql-eval/src/test/kotlin/org.partiql.lang

Other Information

• Updated Unreleased Section in CHANGELOG: NO
• Any backward-incompatible changes? NO, V1 is unreleased
• Any new external dependencies? NO, just a move
• Do your changes comply with the Contributing Guidelines and Code Style Guidelines? YES

License Information

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:exclamation: No coverage uploaded for pull request base (v1@810035c). Click here to learn what that means.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## v1 #1412 +/- ## ===================================== Coverage ? 71.01% Complexity ? 2239 ===================================== Files ? 256 Lines ? 18569 Branches ? 3382 ===================================== Hits ? 13187 Misses ? 4436 Partials ? 946 ``` | [Flag](https://app.codecov.io/gh/partiql/partiql-lang-kotlin/pull/1412/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=partiql) | Coverage Δ | | |---|---|---| | [CLI](https://app.codecov.io/gh/partiql/partiql-lang-kotlin/pull/1412/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=partiql) | `13.77% <ø> (?)` | | | [EXAMPLES](https://app.codecov.io/gh/partiql/partiql-lang-kotlin/pull/1412/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=partiql) | `80.28% <ø> (?)` | | | [LANG](https://app.codecov.io/gh/partiql/partiql-lang-kotlin/pull/1412/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=partiql) | `76.75% <ø> (?)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=partiql#carryforward-flags-in-the-pull-request-comment) to find out more.

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