agrest-docs: parent of AsciiDoc documentation

<!-- https://jarcasting.com/artifacts/io.agrest.docs/agrest-docs/ -->
<dependency>
    <groupId>io.agrest.docs</groupId>
    <artifactId>agrest-docs</artifactId>
    <version>4.9</version>
    <type>pom</type>
</dependency>

// https://jarcasting.com/artifacts/io.agrest.docs/agrest-docs/
implementation 'io.agrest.docs:agrest-docs:4.9'

// https://jarcasting.com/artifacts/io.agrest.docs/agrest-docs/
implementation ("io.agrest.docs:agrest-docs:4.9")

'io.agrest.docs:agrest-docs:pom:4.9'

<dependency org="io.agrest.docs" name="agrest-docs" rev="4.9">
  <artifact name="agrest-docs" type="pom" />
</dependency>

@Grapes(
@Grab(group='io.agrest.docs', module='agrest-docs', version='4.9')
)

libraryDependencies += "io.agrest.docs" % "agrest-docs" % "4.9"

[io.agrest.docs/agrest-docs "4.9"]