[FEATURE] Ramp up and down constraints

[FBumann]

Prerequisites

• I have searched existing issues and discussions
• I have checked the documentation

Feature Category

Enhancement to Existing Component

Problem Statement

FlixOpt currently does not support Ramping. This may be crucial for some users for short term planning. Needed in class Flow.

Proposed Solution

See PyPSA Unit Commitment

Use Case & Examples

Short term planning

Desired API (Optional)

Alternatives Considered

No response

Priority/Impact

Medium - Nice to have enhancement

Additional Context

No response