feat: select cp role by default for individual users (resolves #2135)

[jobara]

Resolves #2135

• Provides a default role (set to consultation participant) when selecting an Individual user's role

Prerequisites

If this PR changes PHP code or dependencies:

• [x] I've run composer format and fixed any code formatting issues.
• [x] I've run composer analyze and addressed any static analysis issues.
• [x] I've run php artisan test and ensured that all tests pass.
• [x] I've run composer localize to update localization source files and committed any changes.

If this PR changes CSS or JavaScript code or dependencies:

• [ ] I've run npm run lint and fixed any linting issues.
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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (a20842c) 97.94% compared to head (e37a572) 97.94%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #2139 +/- ## ========================================= Coverage 97.94% 97.94% Complexity 2146 2146 ========================================= Files 333 333 Lines 9811 9812 +1 ========================================= + Hits 9609 9610 +1 Misses 202 202 ```

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