feat(cube): support postgres cube (launchbadge#3188)

* feat: add cube

* docs: cube docs

* docs: update readme

* fix: cube is now not feature flagged

* fix: formatting

* fix: typeo for PgCube vs Cube

* fix: correct types

* fix: postgres only types for cube

* fix: cube readme

* fix: dont unwrap cubes

* fix: typo on interval

* fix: zero volume cube array

* fix: return type

* fix: update tests

* fix: run with one test type

* fix: log bytes in error

* fix: typo in test

* fix: log bytes for failed length

* fix: string deser

* docs: remove cube from readme

* fix: int to float

* fix: trim floats

* fix: exttra test

* fix: type safe into vectors

* fix: improve error messages

* docs: remove comments

* fix: front load most important logic and const at start

* fix: extract constants

* fix: flags

* fix: avoid redundant buffer creation and use FromStr trait

* fix: handle serializing

* test: cube vec test

* fix: no array cube test

* fix: update test with array for cube

* fix: dont use try from for u8

* fix: conditionally remove padding

* fix: conditional trimming

* fix: idiomatic trimming

* fix: linting

* fix: remove whitespace

* fix: lower case array

* fix: spacing input

* test: one more vec test

* fix: trim square brackets in case they are using postgres spec page

* fix: result types

* fix: format

* fix: box error

* fix: the borrow produces a value

* fix: self serialise

* chore: merge main

* fix: borrow

* fix: clippy

---------

Co-authored-by: James Holman <james.holman@betashares.com.au>

sqlx-postgres/src/type_checking.rs

@@ -30,6 +30,8 @@ impl_type_checking!(
 
         sqlx::postgres::types::PgLQuery,
 
+        sqlx::postgres::types::PgCube,
+
         #[cfg(feature = "uuid")]
         sqlx::types::Uuid,