💡 Add "Become a DRep" Link When Verifying With Stake Key (Non-DRep Users) in Proposal Discussion Forum and Budget Proposals Section

### Area

Proposal Pillar

### Is there new design needed?

Yes

### What?

When a user verifies with their stake key in the proposal discussion forum or budget proposals section and they are **not** already a DRep, display a message and link encouraging them to register as a DRep.

### Why?

Currently, users who verify with their stake key but are not DReps receive no prompt to take the next step toward active governance participation. Providing an option to "Become a DRep" at this point promotes broader community engagement and participation in Cardano governance.

### How?

- Detect the user’s status after stake key verification.
- If the user is **not** a DRep:
- Display a message:
**"Become a DRep and take an active role in shaping Cardano Governance."**
- Include a link or button that directs the user to the DRep registration process or relevant guide.
- Maintain the existing logic for:
- Users who are DReps (prompt to verify with DRep key).
- Users who have not verified with stake key (prompt to do so).

### (Optional) User Story with acceptance criteria

**As a** Cardano community member verifying with my stake key in GovTool
**I want** to see an option to become a DRep if I am not one already
**So that** I am encouraged to participate more actively in governance decisions.

### Acceptance Criteria
- [ ] If user verifies with stake key and is **not** a DRep, display the “Become a DRep” message and link.
- [ ] The message appears in both:
- Proposal Discussion Forum
- Budget Proposals Section
- [ ] The link points to the correct DRep registration process.
- [ ] Existing verification flows for DRep and non-verified users remain unchanged.