Adds comprehensive Settings page with multiple configuration tabs

Introduces a new Settings page with configurable modules:
- General company information
- Calendar and booking settings
- Billing and payment configurations
- Tracking and analytics integrations

Implements modular ViewComponents for each settings section
Enhances user experience with toggle switches and detailed configuration options

PlanTempus.Application/wwwroot/css/controls.css

@@ -34,6 +34,7 @@ swp-toggle-description {
 swp-toggle-slider {
   display: inline-flex;
   width: fit-content;
+  flex-shrink: 0;
   background: var(--color-background);
   border-radius: 6px;
   border: 1px solid var(--color-border);