fix: Change startup message from 'Hi' to 'Hello!'

[github-actions]

Close #182

gen-pr Metadata

• Planning Model: gemini/gemini-2.5-pro
• Coding Tool: Aider
• Coding Command: aider --yes-always --no-check-update --no-gitignore --no-show-model-warnings --no-show-release-notes --model gemini/gemini-2.5-pro --edit-format diff-fenced --message ... src/main.ts

Aider Log

Aider v0.85.2
Main model: gemini/gemini-2.5-pro with diff-fenced edit format
Weak model: gemini/gemini-2.5-flash
Git repo: .git with 79 files
Repo-map: using 4096 tokens, auto refresh
Added src/main.ts to the chat.

Of course. Based on the review comment, I will change the greeting from "Hi" to "Hello!".

Here is the required change for `src/main.ts`:

```typescript
src/main.ts
<<<<<<< SEARCH
  console.info('Hi');
=======
  console.info('Hello!');
>>>>>>> REPLACE
```
Tokens: 10k sent, 62 received. Cost: $0.01 message, $0.01 session.
Applied edit to src/main.ts
Commit 4435c5a fix: Change startup message from 'Hi' to 'Hello!'