Implement SQL features in beam-sqlite.

[amano-kenji]

This was recreated from #655 after accidentally deleting my beam fork along with other repositories.

• T152, T152 // IS (NOT) DISTINCT FROM
• FULL OUTER JOIN
• SQL2003 Null Ordering
• Common Table Expression
• Window functions
• Filter clause // FILTER (WHERE ...)

It closes #648

[amano-kenji]

Any interest in merging this? If it is going to be merged, I would fix the conflict.

[LaurentRDC]

Hey @amano-kenji , I'm happy to review and merge once you resolve the conflicts

[LaurentRDC]

One major weakness of this pull request is the lack of additional tests.
I'm not a SQLite user, so it would be nice to have a few tests to ensure that the new features are indeed supported.

[amano-kenji]

I don't use these features in SQLite, and I decided to cut non-essential coding out of my life. I may write small scripts here and there, but that's about it.

Thus, I close this.