feat: Add support for postgres 'point' type

[SindriFr]

PR Info

• Closes Support PostgreSQL 'point' type #911

New Features

• Add support for postgres point type via sqlx::postgres::types::PgPoint

Breaking Changes

No breaking changes that I am aware of

[tyt2y3]

sorry, recently there's a lot of changes on master. can you cherry-pick your commit to merge into 0.32.x?
I believe that's 77528da ?
sadly we can't depend on sqlx in the root crate, so we need to extract PgPoint to a third crate and perform conversion.

[SindriFr]

sorry, recently there's a lot of changes on master. can you cherry-pick your commit to merge into 0.32.x? I believe that's 77528da ? sadly we can't depend on sqlx in the root crate, so we need to extract PgPoint to a third crate and perform conversion.

Certainly! Do you need me to do anything further?

[SindriFr]

@tyt2y3 You mentioned that sqlx should not be depended on by the root crate. I see that postgres_types (a dependency of sea-query) provides ToSql and FromSql implementations for geo-types Point, would you consider a merge of this branch if I used that instead?
I'd need to add geo-types 0.7 as an optional dependency as well as an optional feature flag in postgres_types when the point feature is enabled.

I've created an alternate PR (#992) with the proposed changes.