Add overview of modules

[sormuras]

Logbook

Module Table

123 modules are part of this project.
 99 declared modules: 9 main modules, 90 test modules including 10 in-module test modules
  4 external modules stored `.bach/external-modules`
 20 system modules provided by Java 16

module	version	category	tags
foo	0.1-ea	declared	main
foo.bar	0.1-ea	declared	main
foo.bar	0.1-ea	declared	test, in-module
java.base	16	system	mandated
java.xml	16	system	-
org.junit.jupiter	5.7.1	external
org.junit.jupiter.api	5.7.1	external
test.foo	0.1-ea	declared	test

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123 modules are part of this project.
 99 declared modules: 9 main modules, 90 test modules including 10 in-module test modules
  4 external modules stored `.bach/external-modules`
 20 system modules provided by Java 16

[sormuras]

Partly implemented in external program https://github.com/sormuras/bach/blob/e2f2280bb0ffc207bd9ca2af48c9ae07f9b33d75/.bach/src/describe.java#L23-L45