Select Experience level

**User Story:**
As a a funder
I want to enter an experience level that i think is required for my bounty
So that contributors have an idea of skill level required to complete

**Acceptance Criteria**
GIVEN i am logged into Gitcoin
WHEN i click fund issue
THEN i will land on the bounty type step
AND i will have drop down with the following experience levels:

- Beginner
- Intermediate
- Advanced

AND i can only select one experience level

**Product & Design Links:**
https://www.figma.com/file/8AFLrc4dx9xnMXUkWOAaAR/Existing-Bounties-Updates?node-id=33%3A1854

Start with the logged-in “fund issue” flow and compare its bounty type step with the linked Figma design. Trace where the experience-level selection belongs and confirm the existing form behavior before making changes. Done means the step offers Beginner, Intermediate, and Advanced, allows only one selection, and matches the acceptance criteria.

Written by the indexing model from the issue text.