Related to #2882

The messaging.py has quite a lot of code with multiple concerns, which can be easily divided into individual independent modules.

This refractor puts different messaging adapters into its modules for better maintainability and readability.

```
hypha/apply/determinations/tests/test_views.py: 20 warnings
  /Users/theskumar/work/hyphaapp/hypha/venv/lib/python3.9/site-packages/django/template/defaulttags.py:862: RemovedInDjango40Warning: The {% ifequal %} template tag is deprecated in favor of {% if %}.
    warnings.warn(
```

See: https://django-filter.readthedocs.io/en/stable/guide/migration.html#view-attributes-renamed-867

```
hypha/apply/api/v1/screening/tests/test_views.py::ScreeningStatusViewSetTests::test_staff_can_list_screening_statuses
hypha/apply/api/v1/screening/tests/test_views.py::ScreeningStatusViewSetTests::test_staff_can_view_screening_statuses_detail
  /Users/theskumar/work/hyphaapp/hypha/venv/lib/python3.9/site-packages/django_filters/rest_framework/backends.py:31: MigrationNotice: `ScreeningStatusViewSet.filter_class` attribute should be renamed `filterset_class`. See: https://django-filter.readthedocs.io/en/master/guide/migration.html See: https://django-filter.readthedocs.io/en/master/guide/migration.html
    filterset_class = self.get_filterset_class(view, queryset)
```

Use `django.test.TestCase` instead of `unittest.TestCase` to 
enable DB access

Do not depend on sorting IDs for checks

Changelog: https://github.com/wagtail/wagtail-factories/compare/2.0.1...2.1.0

2.1.0
=====
 - Add support for Wagtail 3.0 and drop support for all Wagtail versions
   before 2.15
 - Add support for Django 4.0
 - Add support for Python 3.10
 - Removed support for Python 3.6
 - Removed support for Django 2.2 and 3.1
 - Removed support for factory boy <3.2

Chagelog: https://github.com/coderedcorp/wagtail-cache/compare/v1.0.2...v2.1.0

Changelog: https://github.com/torchbox/wagtail-purge/compare/0.1...main

Bump terser from 5.11.0 to 5.14.2

Bump mistune from 2.0.2 to 2.0.3

Bumps [mistune](https://github.com/lepture/mistune) from 2.0.2 to 2.0.3.
- [Release notes](https://github.com/lepture/mistune/releases)
- [Changelog](https://github.com/lepture/mistune/blob/master/docs/changes.rst)
- [Commits](https://github.com/lepture/mistune/compare/v2.0.2...v2.0.3

)

---
updated-dependencies:
- dependency-name: mistune
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Refractor to serve JS locally

Origin: //cdnjs.cloudflare.com/ajax/libs/fancybox/3.4.1/jquery.fancybox.min.js
New: {% static 'js/apply/jquery.fancybox.min.js' %}

    
Original: https://cdn.jsdelivr.net/npm/symbol-es6@0.1.2/symbol-es6.min.js
New: <script src="{% static 'js/apply/symbol-es6.min.js' %}"></script>

Original: https://cdnjs.cloudflare.com/ajax/libs/url-search-params/1.1.0/url-search-params.js
New: <script src="{% static 'js/apply/url-search-params.js' %}"></script>

Fix .editorconfig for Makefile & markdown