Spec Refactor (#73)

* Spec Refactor:

* Spec.build method is removed. Specs are now fully declarative and the DbType is responsible for implementation.
* Add Spec.prefix method
* Change Spec.seek nullOrder, Spec.orderBy direction and nullOrder to be database Default
* Tests are improved and now shared between database specs insteads of duplicated. The increased coverage exposed some tangential issues which are also resolved in this MR (see below). Note: switched from munit assertEquals -> assert until fix for scalameta/munit#855 (comment) is released.

Additional changes:

* No longer need to handle null when using DbCodec.biMap, or implementing DbCodec.readSingle
* When implementing DbCodec, new method readSingleOption must be defined
* Support optional products in outer-join queries (see test OptionalProductTests)
* Switched to latest scalafmt version to prevent OOM in OracleTests
* Make Frag, Query, Update, Returning into regular classes
* Frag.returningKeys method which uses ResultSet.getGeneratedKeys
* Make MySq insertReturning throw, since we shouldn't define 2-query repository methods.

* reduce duplication with shared DbCodec.readSingleOpt impl

* remove unused def in MySqlDbType

* fix SqlLogger error formatting

* use keyColumsArr in Returning

* make sure no expr duplication in sql macro

* add test to ensure that embedded frag param exprs are evaluated only once

.scalafmt.conf

@@ -1,4 +1,4 @@
-version = 3.8.3
+version = 3.8.4-RC3
 runner.dialect = scala3
 rewrite.scala3.insertEndMarkerMinLines = 20
 rewrite.scala3.removeEndMarkerMaxLines = 19

build.sbt

@@ -36,7 +36,7 @@ ThisBuild / publishTo := {
 }
 ThisBuild / publish / skip := true
 
-Global / onChangedBuildSource := ReloadOnSourceChanges
+addCommandAlias("fmt", "scalafmtAll")
 
 val testcontainersVersion = "0.41.4"
 val circeVersion = "0.14.10"