feat: initialize Discord bot project with basic command structure

- Add package.json with dependencies and scripts for building, testing, and running the bot.
- Implement bot startup logic in src/bot.ts, handling interactions and commands.
- Create command structure in src/commands/index.ts, including a ping command in src/commands/ping.ts.
- Add configuration loading from environment variables in src/config.ts.
- Implement command registration in Discord API in src/deploy-commands.ts.
- Bootstrap the bot in src/index.ts.
- Configure TypeScript settings in tsconfig.json.

jest.config.cjs

@@ -0,0 +1,8 @@
+/** @type {import('jest').Config} */
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  testMatch: ["**/*.test.ts"],
+  moduleFileExtensions: ["ts", "js", "json"],
+  clearMocks: true,
+};