Add support for linking to packages from KDoc and Javadoc

[nea89o]

Closes #3004

[vmishenev]

Thank you for the contribution.

Can you add some unit tests for this issue (Javadoc and KDoc links)?
For example,

//JavaTest.kt
    @Test
    fun `should have a link to a package in see doctag`() {
        inlineModelTest(
            """
            |/**
            | * @see java
            | */
            |public class Foo {
            |}
            """, configuration = configuration
        ) {
            with((this / "java" / "Foo").cast<DClass>()) {
                val doc = this.documentation.values.single()
                val expectedDRI = DRI(
                    packageName = "java", classNames = null,
                    target = PointingToDeclaration,
                )
                assertEquals(expectedDRI, (doc.dfs { it is See } as See).address)
            }
        }
    }

[vmishenev]

Thank you again for your contribution.
I will pick up these commits to add unit tests. You will be included as an author of this.
So I have closed it in favour of #3490.

[nea89o]

And thank you for finishing it! I have completely lost this out of my sight.