refactor: move test info to _test and format the rest

[vaeng]

This took a while. I formatted all exercises according to https://github.com/exercism/sqlite/issues/54.

• reformatted every exercise to use the exact same structure
• moved the case tests to the _test.sql file, so they can be read easily be the user
• added a lot of newlines at the end
• switched uuid and name, so it is easer to read and formatted for better readability

[github-actions[bot]]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[vaeng]

@BNAndras

Thanks for checking, I had to leave mid-session and could only upload some half-done work. Sorry, you had to read that state :D