fix: propagate error from createDirectory in system start (#1785)

- `SystemStart` used `try!` when creating the apiserver
  data directory. File system operations can fail for
  legitimate reasons: insufficient permissions, disk full,
  read-only volume. Crashing the process in these cases
  gives the user no actionable error message.
- Replaced with `try` so the error propagates up and is
  surfaced cleanly.

Author: SEPURI-SAI-KRISHNA

Sources/ContainerCommands/System/SystemStart.swift

@@ -104,7 +104,7 @@ extension Application {
 
             let apiServerDataPath = appRoot.appending(FilePath.Component("apiserver"))
             let apiServerDataURL = URL(fileURLWithPath: apiServerDataPath.string)
-            try! FileManager.default.createDirectory(at: apiServerDataURL, withIntermediateDirectories: true)
+            try FileManager.default.createDirectory(at: apiServerDataURL, withIntermediateDirectories: true)
 
             var env = PluginLoader.filterEnvironment()
             env[ApplicationRoot.environmentName] = appRoot.string