Featured Seal Add/Edit form

Fixes

Fixes for #1241 (closed) by @aditiansingh

Description add and edit form of featured seals

Type of PR This PR is a feature.

Tests

Add form -

1. Table - featured_seals.sql
2. Go to http://127.0.0.1:2354/admin/artifacts/featured-seals/add
3. Check if it's uploaded into the DB

Edit form -

1. Go to http://127.0.0.1:2354/artifacts/featured-seals/edit/{id}
2. Try editing a parameter, save it and check if its updated in the DB

Screenshots

add_edit_forms

Checklist:

• My pull request has a descriptive title (not a vague title like "Update index.md").
• My pull request targets the phoenix/develop branch of the repository.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.