fix(sample): add all project files

sample/01-complete-app/src/app.constants.ts

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+export const HELLO_SCENE_ID = 'HELLO_SCENE_ID';
+
+export const GreeterBotName = 'greeter';

sample/01-complete-app/src/app.module.ts

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+import { Module } from '@nestjs/common';
+import { TelegrafModule } from 'nestjs-telegraf';
+import { EchoModule } from './echo/echo.module';
+import { GreeterModule } from './greeter/greeter.module';
+import { sessionMiddleware } from './middleware/session.middleware';
+import { GreeterBotName } from './app.constants';
+
+@Module({
+  imports: [
+    TelegrafModule.forRoot({
+      token: process.env.ECHO_BOT_TOKEN,
+      middlewares: [sessionMiddleware],
+      include: [EchoModule],
+    }),
+    TelegrafModule.forRoot({
+      name: GreeterBotName,
+      token: process.env.GREETER_BOT_TOKEN,
+      middlewares: [sessionMiddleware],
+      include: [GreeterModule],
+    }),
+    EchoModule,
+    GreeterModule,
+  ],
+})
+export class AppModule {}

sample/01-complete-app/src/echo/echo.module.ts

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+import { Module } from '@nestjs/common';
+import { EchoUpdate } from './echo.update';
+import { EchoService } from './echo.service';
+import { HelloScene } from './scenes/hello.scene';
+
+@Module({
+  providers: [EchoUpdate, EchoService, HelloScene],
+})
+export class EchoModule {}

sample/01-complete-app/src/echo/echo.service.ts

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+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class EchoService {
+  echo(text: string): string {
+    return `Echo: ${text}`;
+  }
+}

sample/01-complete-app/src/echo/echo.update.ts

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+import { Telegraf } from 'telegraf';
+import { Command, Help, InjectBot, On, Start, Update } from 'nestjs-telegraf';
+import { EchoService } from './echo.service';
+import { HELLO_SCENE_ID } from '../app.constants';
+import { Context } from '../interfaces/context.interface';
+
+@Update()
+export class EchoUpdate {
+  constructor(
+    @InjectBot()
+    private readonly bot: Telegraf<Context>,
+    private readonly echoService: EchoService,
+  ) {}
+
+  @Start()
+  async onStart(ctx: Context): Promise<void> {
+    const me = await this.bot.telegram.getMe();
+    await ctx.reply(`Hey, I'm ${me.first_name}`);
+  }
+
+  @Help()
+  async onHelp(ctx: Context): Promise<void> {
+    await ctx.reply('Send me any text');
+  }
+
+  @Command('scene')
+  async onSceneCommand(ctx: Context): Promise<void> {
+    await ctx.scene.enter(HELLO_SCENE_ID);
+  }
+
+  @On('message')
+  async onMessage(ctx: Context): Promise<void> {
+    console.log('New message received');
+
+    if ('text' in ctx.message) {
+      const messageText = ctx.message.text;
+      const echoText = this.echoService.echo(messageText);
+      await ctx.reply(echoText);
+    } else {
+      await ctx.reply('Only text messages');
+    }
+  }
+}

sample/01-complete-app/src/echo/scenes/hello.scene.ts

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+import { Scene, SceneEnter, SceneLeave, Command } from 'nestjs-telegraf';
+import { HELLO_SCENE_ID } from '../../app.constants';
+import { Context } from '../../interfaces/context.interface';
+
+@Scene(HELLO_SCENE_ID)
+export class HelloScene {
+  @SceneEnter()
+  async onSceneEnter(ctx: Context): Promise<void> {
+    console.log('Enter to scene');
+    await ctx.reply('Welcome on scene ✋');
+  }
+
+  @SceneLeave()
+  async onSceneLeave(ctx: Context): Promise<void> {
+    console.log('Leave from scene');
+    await ctx.reply('Bye Bye 👋');
+  }
+
+  @Command('hello')
+  async onHelloCommand(ctx: Context): Promise<void> {
+    console.log('Use say hello');
+    await ctx.reply('Hi');
+  }
+
+  @Command('leave')
+  async onLeaveCommand(ctx: Context): Promise<void> {
+    await ctx.scene.leave();
+  }
+}

sample/01-complete-app/src/greeter/greeter.module.ts

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+import { Module } from '@nestjs/common';
+import { GreeterUpdate } from './greeter.update';
+
+@Module({
+  providers: [GreeterUpdate],
+})
+export class GreeterModule {}

sample/01-complete-app/src/greeter/greeter.update.ts

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+import { Hears, Start, Update } from '../../../../lib';
+import { Context } from '../interfaces/context.interface';
+
+@Update()
+export class GreeterUpdate {
+  @Start()
+  async onStart(ctx: Context): Promise<void> {
+    await ctx.reply('Say hello to me');
+  }
+
+  @Hears(['hi', 'hello', 'hey', 'qq'])
+  async onGreetings(ctx: Context): Promise<void> {
+    const { first_name } = ctx.from;
+    await ctx.reply(`Hey ${first_name}`);
+  }
+}

sample/01-complete-app/src/interfaces/context.interface.ts

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+import { SceneContextMessageUpdate } from 'telegraf/typings/stage';
+
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface Context extends SceneContextMessageUpdate {}

sample/01-complete-app/src/main.ts

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+import 'dotenv/config';
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  await NestFactory.createApplicationContext(AppModule);
+}
+bootstrap();

sample/01-complete-app/src/middleware/session.middleware.ts

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+import { session } from 'telegraf';
+
+export const sessionMiddleware = session();