chore: implemented example project

[samirakhmedov]

Related tasks

9

Dependence on other Pull Requests (optional)

9

Changes

Refactored example project - cleaned up code, made example interactive and easy to use, additionally put some valuable notes over there

https://github.com/surfstudio/yandex-mapkit-lite-flutter/assets/54618146/5ff3fd25-6728-4e41-9fc3-782ec5d8839a

Checklist for self-check

• [x] Commits and PRs have been filed according to the rules on the project.
• [x] The author is marked as an assigne and assigned mandatory reviewers.
• [x] Required labels marked
• [x] Specified related tasks and/or related PRs.
• [x] Specified Changes.
• [x] Attached videos/screenshots demonstrating the fix/feature.
• [x] All unspecified fields in the PR description deleted.
• [ ] New code covered by tests.

Checklist for reviewers

• [ ] CI passed successfully (with a green check mark).
• [ ] PR is atomic, by volume no more than 400 (+-) corrected lines (not including codogen).

Design:

• [ ] System design corresponds to the agreements on structure and architecture on the project.
• [ ] The code is decomposed into necessary and sufficient components.

Functionality:

• [ ] The code solves the problem.
• [ ] Any changes to the user interface are reasonable and look good.

Complexity:

• [ ] The code is clear, easy to read, functions are small, no more than 50 lines.
• [ ] The logic is not overcomplicated, there is no overengineering (no code sections that may be needed in the future, but no one knows about it).

Tests:

• [ ] Updated or added tests for mandatory components.
• [ ] The tests are correct, helpful, and well designed/developed.

Naming:

• [ ] The naming of variables, methods, classes and other components is understandable.

Comments:

• [ ] The comments are understandable and helpful.

Documentation:

• [ ] All labels are correct
• [ ] Technical documentation updated (after approval, updates last reviewer).