Add codemagic option in CICD in generated projects

[DDavidPrime]

Overview

Closes: #590

Introduces new codemagic option as part of the cicd flag in projects generated with the rx_bloc_cli package.

Checklist

Implementation

• [x] Implementation matches ticket acceptance criteria and technical notes
• [x] Manually tested against Acceptance Criteria
• [ ] UI checked in Light / Dark mode

Stability

• [x] Checked if changes affect any features and verified affected features work as expected
• [x] Added unit tests for new code and verified existing tests work as expected

Code quality

• [x] Updated CHANGELOG.md, README.md and package versions in pubspec.yaml
• [ ] Dependencies are updated to latest versions or new tickets are created if there are breaking changes or deprecations
• [ ] If an unrelated part of the codebase needs to be updated or refactored, create tickets with proposed changes

[codecov-commenter]

Codecov Report

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

Project coverage is 80.72%. Comparing base (6a67490) to head (ddca464). Report is 11 commits behind head on develop.

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:exclamation: There is a different number of reports uploaded between BASE (6a67490) and HEAD (ddca464). Click for more details.

HEAD has 7 uploads more than BASE

| Flag | BASE (6a67490) | HEAD (ddca464) | |------|------|------| ||1|8|

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #696 +/- ## ============================================ - Coverage 95.12% 80.72% -14.41% ============================================ Files 16 68 +52 Lines 349 1442 +1093 ============================================ + Hits 332 1164 +832 - Misses 17 278 +261 ```

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