[FEATURE] Add more graph options

[joluj]

User Story

1. As a {user}
2. I want {to have more options for the mermaid graph generation}
3. So that {I can create graphs that suit my context}

User Acceptance Criteria

The following options should be available

• expand-composite-blocks: Default true
• show-attributes: Default: false

Definitions of Done

• A PR has been opened and accepted
• All user acceptance criteria are met
• All tests are passing