Added More GitHub Configuration

[StPfeffer]

Description

Adicionei mais algumas configurações para o repositório no GitHub:

• Code Owners.
• Dependabot
• Template de Pull Request

Type of change

• [x] New feature (non-breaking change which adds functionality)

Checklist

• [x] I ran cargo clippy --all -- -D warnings just before my last commit and fixed any issue that was found.
• [x] I ran cargo fmt just before my last commit.
• [x] I ran cargo test just before my last commit and all tests passed.
• [x] I added my code to the corresponding mod.rs file within its own folder, and in any parent folder(s).