Cross scala 3

[fedefernandez]

Overview

This PR brings cross-compilation with Scala 3 to memeid. The trickiest part was the memeid4s-literal, where a new Scala 3 macro was implemented.

I've also added the sbt-projectmatrix plugin and re-configured the modules. The main purpose is to be able to maintain different modules with different crossScalaVersions.

Caveats

Some caveats from the current upgrade:

1. The build fails due to a misconfiguration with scalafix. For some reason, the sbt-scalafix-defaults plugin is bringing Scala 2 config in a Scala 3 build. Locally works fine. For now, the decision I made is to remove the plugin. The error can be seen here
2. The mdoc compilation fails with doobie code and Scala 3. In this PR we're just compiling the documentation against Scala 2.12 and Scala 2.13. I'll create an issue with the error once this is merged.

error:
Exception occurred while executing macro expansion.
java.lang.NullPointerException
	at doobie.util.PosPlatform$.originImpl(PosPlatform.scala:21)

info: Compiled in 20.61s (1 error)
[error] java.lang.RuntimeException: mdoc failed
[error] 	at scala.sys.package$.error(package.scala:27)
[error] 	at mdoc.SbtMain$.main(Main.scala:30)
[error] 	at mdoc.SbtMain.main(Main.scala)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
[error] stack trace is suppressed; run last microsite3 / Compile / runMain for the full output
[error] (microsite3 / Compile / runMain) mdoc failed
[error] Total time: 35 s, completed Feb 2, 2023, 11:03:25 PM

[codecov]

Codecov Report

Merging #645 (d2bcf1e) into main (a353f16) will increase coverage by 0.61%.
The diff coverage is 94.44%.

@@            Coverage Diff             @@
##             main     #645      +/-   ##
==========================================
+ Coverage   98.85%   99.46%   +0.61%     
==========================================
  Files          14       18       +4     
  Lines          87      187     +100     
  Branches        7        5       -2     
==========================================
+ Hits           86      186     +100     
  Misses          1        1              

Impacted Files	Coverage Δ
...-cats/src/main/scala/memeid4s/cats/instances.scala	100.00% <ø> (ø)
...ral/src/main/scala-2/memeid4s/literal/Macros.scala	100.00% <ø> (ø)
...al/src/main/scala-2/memeid4s/literal/package.scala	100.00% <ø> (ø)
...4s/src/main/scala/memeid4s/digest/Digestible.scala	100.00% <ø> (ø)
...odules/memeid4s/src/main/scala/memeid4s/UUID.scala	97.61% <75.00%> (-2.39%)	⬇️
...ral/src/main/scala-3/memeid4s/literal/Macros.scala	100.00% <100.00%> (ø)
...al/src/main/scala-3/memeid4s/literal/package.scala	100.00% <100.00%> (ø)
...s/memeid4s/src/main/scala/memeid4s/node/Node.scala	100.00% <0.00%> (ø)
...s/memeid4s/src/main/scala/memeid4s/time/Time.scala	100.00% <0.00%> (ø)
... and 13 more

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[fedefernandez]

The doobie mdoc is still to be implemented

[fedefernandez]

Pending to improve the build.sbt

[fedefernandez]

@gutiory this is ready for review. Thanks

[gutiory]

Astonishing work @fedefernandez!. I've just left a minor comment.

[fedefernandez]

@gutiory I've applied your changes. I'm not sure why the patch is complaining, but the changes look good to me. Could you please review it again?