feat: Add missing unit tests for CROSS JOIN and Raw Queries (#115)

This commit introduces new unit tests to improve test coverage based on
the existing documentation.

- Added tests for CROSS JOIN functionality in
`tests/unit/select.test.ts`. These tests cover simple CROSS JOINs, CROSS
JOINs with WHERE clauses, and CROSS JOINs with specific fields selected.

- Created a new test file `tests/unit/raw.test.ts` to specifically test
the `raw()` query builder method. These tests cover raw SELECT (with
fetchType 'ALL', 'ONE', and default), INSERT, UPDATE, and DELETE
statements, including the handling of parameterized arguments.

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: G4brym

.husky/.gitignore

@@ -30,8 +30,6 @@ Test your code with Jest framework:
 npm run test
 ```
 
-**Note:** This project uses [husky](https://typicode.github.io/husky/), [pinst](https://github.com/typicode/pinst) and [commitlint](https://commitlint.js.org/) to automatically execute test and [lint commit message](https://www.conventionalcommits.org/) before every commit.
-
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