Adds drag-to-scroll functionality for schedule tables

Enables intuitive horizontal scrolling for schedule containers

Implements drag scroll interaction with:
- Smooth scrolling experience
- Prevention of interaction with nested elements
- Improved mobile and desktop usability

PlanTempus.Application/wwwroot/css/employees.css

@@ -887,6 +887,17 @@ swp-schedule-scroll {
   max-width: var(--page-max-width);
   margin: 0 auto;
   overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+  cursor: grab;
+}
+
+swp-schedule-scroll.dragging {
+  cursor: grabbing;
+  user-select: none;
+}
+
+swp-schedule-scroll.dragging * {
+  pointer-events: none;
 }
 
 /* Når drawer er åben: page-container styles (padding animeres via JS) */