feat(maillog): remove email service and introduce maillog

[hgw77]

Summary

Remove Email Service Plugin and replaced it with Maillog

Changes Made

Email Service

• remove all email service related code
• renamed the rest to maillog
• adjust all related things like domain_config or service_navigation

Related DomainConfig

• we need to adjust the domain config and rename email_service to maillog in regions where email service is disabled

Refactoring maillog

• moved everything from external repo into elektra, so we have less external dependency
• migrate to typescript and added tests
• refactor UI to use modern Juno UI Components for smother user experience, like the Panel for Details and Form Elements with Description (see screenshot)
• better loading indicator
• removed complexity by reducing components
• reduce API calls by debouncing the onChange for inputs

Bug Fix: Date Range Selection

• there was a problem in EventList.tsx where selecting start and end dates only sent the last selected date to the API

Related Issues

issue: #1878

Sceenshots

Before

After

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.