Cleaned up and removed columns so it is what an actual Solari board would show

- This update adds ISO date/time helpers for Amtrak timestamps, refactors the train table to show arrival time, status, and track details, and tracks the current station context in the UI.
- It also hardens station status decoding with a safe fallback to Unknown and simplifies the row model to match the new display.

Sources/AmtrakStatus/AmtrakDateFormatting.swift

@@ -0,0 +1,37 @@
+import Foundation
+
+struct AmtrakDateFormatting {
+    static let isoFormatter = ISO8601DateFormatter()
+    
+    static let timeFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .none
+        formatter.timeStyle = .short
+        return formatter
+    }()
+    
+    static let dateFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateStyle = .medium
+        formatter.timeStyle = .none
+        return formatter
+    }()
+    
+    static func time(from isoString: String?) -> String? {
+        guard let isoString, !isoString.isEmpty, let date = isoFormatter.date(
+            from: isoString) else {
+            return nil
+            }
+        
+        return timeFormatter.string(from: date)
+    }
+    
+    static func date(from isoString: String?) -> String? {
+        guard let isoString, !isoString.isEmpty, let date = isoFormatter.date(
+            from: isoString) else {
+            return nil
+        }
+        
+        return dateFormatter.string(from: date)
+    }
+}