Explicitly enable Dokka javadocs generation

Actually we don't need javadoc generation for our internal stuff like
':kotlin-gradle-plugin'. But ':kotlin-gradle-plugin-api' is a public api
 and should have properly generated javadocs.

^KT-55520 In Progress

libraries/tools/kotlin-gradle-plugin-api/build.gradle.kts

@@ -4,6 +4,8 @@ plugins {
     id("org.jetbrains.kotlinx.binary-compatibility-validator")
 }
 
+configureDokkaPublication()
+
 dependencies {
     commonApi(platform(project(":kotlin-gradle-plugins-bom")))
     commonApi(project(":kotlin-gradle-plugin-annotations"))

libraries/tools/kotlin-gradle-plugin/Module.md

@@ -1,117 +0,0 @@
-# Module kotlin-gradle-plugin
-
-`kotlin-gradle-plugin` artifact provides multiple plugins.
-
-### kotlin
-
-How to apply:
-
-```
-apply plugin: 'kotlin'
-```
-
-Tasks:
-
-| Name | Type | Description
-|------------------------------|--------------------|---------------|
-| compileKotlin                | [KotlinJvmCompile] | A task is created for `main` source set |
-| compileTestKotlin            | [KotlinJvmCompile] | A task is created for `test` source set |
-| compile*SourceSetName*Kotlin | [KotlinJvmCompile] | A task is created for each additional source set |
-
-Each [KotlinJvmCompile] task provides `kotlinOptions` ([KotlinJvmOptions]) extension:
-
-```
-compileKotlin {
-    kotlinOptions {
-        noStdlib = true
-    }
-    // kotlinOptions.noStdlib = true
-}
-```
-
-### kotlin-android
-
-A plugin that should be used for Android development.
-
-How to apply:
-
-```
-apply plugin: 'kotlin-android'
-```
-
-Tasks:
-
-| Name | Type | Description
-|------------------------------|--------------------|---------------|
-| compile*VariantName*Kotlin | [KotlinJvmCompile] | A task is created for each variant |
-
-Note that tasks are created after evaluation, so all references to tasks should be done in `afterEvaluate` section:
-
-```
-afterEvaluate {
-    compileDebugKotlin {
-        kotlinOptions {
-            noStdlib = true
-        }
-    }
-}
-```
-
-Android plugin also adds `kotlinOptions` extension to `android` section to set options for all kotlin tasks:
-
-```
-android {
-    kotlinOptions {
-        noStdlib = true
-    }
-}
-```
-
-Task's `kotlinOptions` "override" ones in `android` section:
-
-```
-android {
-    kotlinOptions {
-        noStdlib = true
-    }
-}
-
-afterEvaluate {
-    compileDebugKotlin {
-        kotlinOptions {
-            noStdlib = false
-        }
-    }
-}
-// compileProductionKotlin.noStdlib == true
-// compileDebugKotlin.noStdlib == false
-```
-
-### Kotlin/JS
-
-How to apply:
-
-```
-plugins {
-    id 'org.jetbrains.kotlin.js'
-}
-```
-
-Tasks:
-
-| Name | Type | Description
-|--------------------------------|--------------------|---------------|
-| compileKotlin2Js               | [KotlinJsCompile] | A task is created for `main` source set |
-| compileTestKotlin2Js           | [KotlinJsCompile] | A task is created for `test` source set |
-| compile*SourceSetName*Kotlin2Js| [KotlinJsCompile] | A task is created for each additional source set |
-
-Each [KotlinJsCompile] task provides `kotlinOptions` ([KotlinJsOptions]) extension:
-
-```
-compileKotlinJs {
-    kotlinOptions {
-        noStdlib = true
-    }
-    // kotlinOptions.noStdlib = true
-}
-```

libraries/tools/kotlin-gradle-plugin/build.gradle.kts

@@ -125,15 +125,6 @@ tasks {
         enableStricterValidation.set(true)
     }
 
-    withType<DokkaTask>().configureEach {
-        dokkaSourceSets.configureEach {
-            includes.from("Module.md")
-        }
-    }
-    register("dokka") {
-        dependsOn(named("dokkaJavadoc"))
-    }
-
     withType<ShadowJar>().configureEach {
         relocate("com.github.gundy", "$kotlinEmbeddableRootPackage.com.github.gundy")
         relocate("de.undercouch.gradle.tasks.download", "$kotlinEmbeddableRootPackage.de.undercouch.gradle.tasks.download")