Feat/bec atlas admin widget

[cappel89]

This pull request introduces a new Admin View to the application, providing administrators with a dedicated interface for managing experiments, messaging services, and other admin-specific tasks. The changes involve integrating the new view into the main application, as well as implementing the supporting widgets and logic for the admin panel, including authentication, experiment selection, and toolbar navigation.

Currently, this is still a draft stage, meaning that not all features are working yet. The first draft allows you to (A) Login to bec-atlas-dev, (B) select a new experiment from all available experiments for the given user, and (C) send this update to bec-atlas-dev.

Next steps:

• Fix little bugs, and cleanup UI for experiment selection
• Add interface for messaging services. Display Scilog (automatically selected) and work on an interface to add signal as a messaging service.
• Discuss general styling for (Angular Material like designs, e.g. overview cards to display experiment information, and messaging service)
• Add tests for new view and widgets

[codecov]

Codecov Report

❌ Patch coverage is 58.84718% with 307 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
..._view/experiment_selection/experiment_selection.py	56.88%	92 Missing and 5 partials ⚠️
...vices/bec_atlas_admin_view/bec_atlas_admin_view.py	63.93%	66 Missing ⚠️
...ces/bec_atlas_admin_view/bec_atlas_http_service.py	43.75%	59 Missing and 4 partials ⚠️
...bec_atlas_admin_view/experiment_selection/utils.py	18.18%	36 Missing ⚠️
...gets/services/bec_atlas_admin_view/login_dialog.py	20.00%	28 Missing ⚠️
...n_view/experiment_selection/experiment_mat_card.py	87.82%	12 Missing and 2 partials ⚠️
...idgets/applications/views/admin_view/admin_view.py	86.66%	2 Missing ⚠️
...gets/applications/views/admin_view/admin_widget.py	92.85%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!