Unify Kotlin daemon JVM arguments settings in Kotlin repo

Now 'kotlin-daemon-config' convention plugin should be added into
settings plugins to configure Kotlin daemon.

repo/gradle-settings-conventions/Readme.md

@@ -7,3 +7,4 @@ Provides common settings convention plugins for the repo.
 - "build-cache" - local and remote build cache configuration
 - "gradle-enterprise" - configures build scans upload
 - "jvm-toolchain-provisioning" - configures JVM toolchain to download project JDKs via Disco API
+- "kotlin-daemon-config" - common project JVM arguments for Kotlin daemon

repo/gradle-settings-conventions/gradle.properties

@@ -1,5 +1,5 @@
 kotlin.build.gradlePlugin.version=0.0.39
 kotlin.options.suppressFreeCompilerArgsModificationWarning=true
 cacheRedirectorEnabled=true
-# Should be the same as in the root gradle.properties to avoid spawning second daemon
+# Should be in sync with ":kotlin-daemon-config" project convention script configuration
 kotlin.daemon.jvmargs=-Xmx3g -Dkotlin.js.compiler.legacy.force_enabled=true

repo/gradle-settings-conventions/kotlin-daemon-config/build.gradle.kts

@@ -0,0 +1,16 @@
+plugins {
+    `kotlin-dsl`
+    id("org.jetbrains.kotlin.jvm")
+}
+
+repositories {
+    mavenCentral()
+    gradlePluginPortal()
+}
+
+dependencies {
+    // TODO: migrate to api only dependency once Kotlin daemon configuration will be available there (Yahor)
+    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin")
+}
+
+kotlin.jvmToolchain(8)

repo/gradle-settings-conventions/kotlin-daemon-config/src/main/kotlin/kotlin-daemon-config.settings.gradle.kts

@@ -0,0 +1,14 @@
+import org.jetbrains.kotlin.gradle.dsl.KotlinTopLevelExtension
+import org.jetbrains.kotlin.gradle.plugin.KotlinBasePlugin
+
+gradle.afterProject {
+    plugins.withType<KotlinBasePlugin> {
+        extensions.configure<KotlinTopLevelExtension> {
+            // Should be in sync with 'gradle-settings-conventions/gradle.properties'
+            kotlinDaemonJvmArgs = listOf(
+                "-Xmx3g",
+                "-Dkotlin.js.compiler.legacy.force_enabled=true"
+            )
+        }
+    }
+}

repo/gradle-settings-conventions/settings.gradle.kts

@@ -23,6 +23,7 @@ plugins {
 include(":build-cache")
 include(":gradle-enterprise")
 include(":jvm-toolchain-provisioning")
+include(":kotlin-daemon-config")
 
 // Unfortunately it is not possible to apply build-cache.settings.gradle.kts as script compilation
 // could not then find types from "kotlin-build-gradle-plugin"