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.

.gitignore

@@ -17,4 +17,8 @@ node_modules/
 
 # build and test outputs
 dist/
-coverage/
+coverage/
+
+# doc template
+arc42_adoc/
+download_docs_template.py