Add Moditect, source module info, to allow Kotlin module usage with Java Module system

[cowtowncoder]

Since Jackson does not require Java 9 (or higher baseline), module system can not be used to create module-info.class.
But most Jackson components/modules are using Moditect (https://github.com/moditect/moditect) -- support added in 2.11 -- to produce necessary metadata even when building using Java 8 tools.
It would be good to add necessary build support to Kotlin module too.

This issue:

FasterXML/jackson-databind#2273

can show what is needed; basic addition would be:

1. Add src/moditect/module-info.java with dependency definitions (see Joda module's file, f.ex: https://github.com/FasterXML/jackson-datatype-joda/blob/2.12/src/moditect/module-info.java )
2. Add plugin invocation in pom.xml (see https://github.com/FasterXML/jackson-datatype-joda/blob/2.12/pom.xml#L106 )

with appropriate modifications -- mostly, need to know Kotlin core module's JPMS coordinates.

[cowtowncoder]

Good Hacktoberfest issue too probably.

cc @GedMarc who is the Moditect/module-info wizard.

[GedMarc]

I'll see if I can setup a base with the kotlin coordinates

[dinomite]

@GedMarc Excited to see this, let me know if you need any help. I haven't actually anything with modules yet…but maybe I can be useful eyes?

[cowtowncoder]

I think we have a test suite:

https://github.com/FasterXML/jackson-jdk11-compat-test

which might also help in verification.

[GedMarc]

The module info looks like so - kotlin needs base + desktop

I'll look at getting it into the module and the test cases

module com.fasterxml.jackson.kotlin {
    requires java.base;
    requires java.desktop;
    requires kotlin.stdlib;

   requires com.fasterxml.jackson.databind;
   requires com.fasterxml.jackson.annotations;
}