Add ability to auto-generate docs for forage-android

Restore changes

.gitignore

@@ -16,3 +16,6 @@ local.properties
 SecretRingKey.gpg
 /buildSrc/build/
 *.jks
+
+# Dokka HTML documentation
+reference-docs/

build.gradle

@@ -14,6 +14,20 @@ plugins {
     id 'com.google.dagger.hilt.android' version '2.44' apply false
     id 'io.github.gradle-nexus.publish-plugin' version '1.1.0'
     id 'org.jetbrains.kotlinx.kover' version '0.6.1'
+    id "org.jetbrains.dokka" version "1.9.0"
+}
+
+subprojects {
+    if (name != "forage-android") return
+
+    apply plugin: 'org.jetbrains.dokka'
+
+    tasks.named("dokkaHtml", org.jetbrains.dokka.gradle.DokkaTask.class) {
+        outputDirectory.set(file("${rootDir}/reference-docs"))
+        pluginsMapConfiguration.set(
+            ["org.jetbrains.dokka.base.DokkaBase": """{ "separateInheritedMembers": true}"""]
+        )
+    }
 }
 
 spotless {