add welcome plugin (currently uncompilable) and small fix in kdoc of template

template/src/main/kotlin/TemplatePlugin.kt

@@ -20,7 +20,7 @@ import org.koin.core.module.Module
 @Serializable
 class TemplatePlugin : Plugin {
     /**
-     * Default logger of [TemplatePlugin] got with [logger]
+     * Default logger of [WelcomePlugin] got with [logger]
      */
     private val log = logger
 
@@ -43,7 +43,7 @@ class TemplatePlugin : Plugin {
     }
 
     /**
-     * Final configuration of bot. Here we are getting [Config] from [koin] and configure reaction on `/start` command
+     * Final configuration of bot. Here we are getting [Config] from [koin]
      */
     override suspend fun BehaviourContext.setupBotPlugin(koin: Koin) {
         val config = koin.getOrNull<Config>()

welcome/build.gradle

@@ -0,0 +1,26 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath libs.kotlin.gradle.plugin
+        classpath libs.kotlin.serialization.plugin
+    }
+}
+
+plugins {
+    alias libs.plugins.kotlin.jvm
+    alias libs.plugins.kotlin.serialization
+}
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+dependencies {
+    implementation libs.kotlin
+    api libs.plagubot.plugin
+    api libs.kslog
+}

welcome/src/main/kotlin/WelcomePlugin.kt

@@ -0,0 +1,60 @@
+import dev.inmo.kslog.common.logger
+import dev.inmo.kslog.common.w
+import dev.inmo.plagubot.Plugin
+import dev.inmo.tgbotapi.extensions.api.send.reply
+import dev.inmo.tgbotapi.extensions.api.send.sendMessage
+import dev.inmo.tgbotapi.extensions.behaviour_builder.BehaviourContext
+import dev.inmo.tgbotapi.extensions.behaviour_builder.triggers_handling.onCommand
+import dev.inmo.tgbotapi.extensions.behaviour_builder.triggers_handling.onMyChatMemberUpdated
+import dev.inmo.tgbotapi.types.chat.PrivateChat
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.*
+import org.jetbrains.exposed.sql.Database
+import org.koin.core.Koin
+import org.koin.core.module.Module
+
+/**
+ * This is template of plugin with preset [log]ger, [Config] and template configurations of [setupDI] and [setupBotPlugin].
+ * Replace [pluginConfigSectionName] value with your one to customize configuration section name
+ */
+@Serializable
+class WelcomePlugin : Plugin {
+    /**
+     * Default logger of [WelcomePlugin] got with [logger]
+     */
+    private val log = logger
+
+    /**
+     * Configuration class for current plugin
+     *
+     * See realization of [setupDI] to get know how this class will be deserialized from global config
+     *
+     * See realization of [setupBotPlugin] to get know how to get access to this class
+     */
+    @Serializable
+    private class Config(
+    )
+
+    /**
+     * DI configuration of current plugin. Here we are decoding [Config] and put it into [Module] receiver
+     */
+    override fun Module.setupDI(database: Database, params: JsonObject) {
+        single { get<Json>().decodeFromJsonElement(Config.serializer(), params[pluginConfigSectionName] ?: return@single null) }
+    }
+
+    /**
+     * Final configuration of bot. Here we are getting [Config] from [koin]
+     */
+    override suspend fun BehaviourContext.setupBotPlugin(koin: Koin) {
+        val config = koin.getOrNull<Config>()
+
+        if (config == null) {
+            log.w("Plugin has been disabled due to absence of \"$pluginConfigSectionName\" field in config or some error during configuration loading")
+            return
+        }
+    }
+
+    companion object {
+        private const val pluginConfigSectionName = "welcome"
+    }
+}