Feat: Custom Pages Routes

Summary / Highlights

This pull request introduces a new feature for managing custom pages within a community. It includes the addition of new handlers, services, and store methods to handle the creation, updating, deletion, sharing, information retrieval, and listing of custom pages. Additionally, it introduces a utility function to create unique slugs for these pages and corresponding unit tests.

New feature: Custom Pages Management

Handlers:
- Added CustomPagesHandler class with methods to handle routes for creating, updating, deleting, sharing, retrieving info, listing, and publishing custom pages. (src/api/handlers/custom_pages.py)
Services:
- Added CustomPagesService class to serve as the service layer for custom pages, providing methods to interact with the store layer. (src/api/services/custom_pages.py)
Store:
- Added CustomPagesStore class with methods to interact with the database for custom pages. (src/api/store/custom_pages.py)

Utility Enhancements

Unique Slug Creation:
- Added create_unique_slug function to generate unique slugs for custom pages. (src/api/utils/api_utils.py) [1] [2]

Testing

Unit Tests:
- Added unit tests for the create_unique_slug function to ensure it generates unique and correctly formatted slugs. (src/api/tests/unit/utils/test_create_unique_slug.py)

Miscellaneous

URL Routing:
- Registered CustomPagesHandler in the URL routing configuration. (src/api/urls.py) [1] [2]
Utility Function Update:
- Enhanced parse_list function to handle lists of dictionaries. (src/_main_/utils/common.py)

Details (Give details about what this PR accomplishes, include any screenshots etc)

Testing Steps (Provide details on how your changes can be tested)

Requirements (place an `x` in each `[ ]`)

[ ] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
[ ] I've tested my changes manually.
[ ] I've added unit tests to my PR.

Transparency (Project board)

[ ] I've given my PR a meaningful title.
[ ] I linked this PR to the relevant issue.
[ ] I moved the linked issue from the "Sprint backlog" to "In progress" when I started this.
[ ] I moved the linked issue to "QA Verification" now that it is ready to merge.

Codecov Report

Attention: Patch coverage is 92.85714% with 41 lines in your changes missing coverage. Please review.

Project coverage is 58.16%. Comparing base (38a2625) to head (910bc74). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/api/store/custom_pages.py	87.75%	18 Missing :warning:
src/api/services/custom_pages.py	78.12%	14 Missing :warning:
src/_main_/utils/common.py	0.00%	8 Missing :warning:
src/api/tests/common.py	91.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1185 +/- ## ========================================== + Coverage 57.55% 58.16% +0.60% ========================================== Files 491 495 +4 Lines 36027 36586 +559 ========================================== + Hits 20736 21279 +543 - Misses 15291 15307 +16 ```

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massenergize / api