Client customization late-join spawner priority for arrivals/cryostorage (#24586)

* Initial commit, requires server restart to take effect

* Exposes callbacks directly instead, takes effect immediately

* Cleaned up control flow, swapped cvar for client customization

* Switched to int, dictionary of callbacks, migration

* Update Content.Shared/Preferences/SpawnPriorityPreference.cs

* krunkle stan

---------

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Resources/Locale/en-US/preferences/ui/humanoid-profile-editor.ftl

@@ -21,6 +21,7 @@ humanoid-profile-editor-export-button = Export
 humanoid-profile-editor-save-button = Save
 humanoid-profile-editor-clothing-label = Clothing:
 humanoid-profile-editor-backpack-label = Backpack:
+humanoid-profile-editor-spawn-priority-label = Spawn priority:
 humanoid-profile-editor-eyes-label = Eye color:
 humanoid-profile-editor-jobs-tab = Jobs
 humanoid-profile-editor-preference-unavailable-stay-in-lobby-button = Stay in lobby if preference unavailable.
@@ -30,6 +31,12 @@ humanoid-profile-editor-preference-jumpskirt = Jumpskirt
 humanoid-profile-editor-preference-backpack = Backpack
 humanoid-profile-editor-preference-satchel = Satchel
 humanoid-profile-editor-preference-duffelbag = Duffelbag
+
+# Spawn priority
+humanoid-profile-editor-preference-spawn-priority-none = None
+humanoid-profile-editor-preference-spawn-priority-arrivals = Arrivals
+humanoid-profile-editor-preference-spawn-priority-cryosleep = Cryosleep
+
 humanoid-profile-editor-jobs-amount-in-department-tooltip = Jobs in the {$departmentName} department
 humanoid-profile-editor-department-jobs-label = {$departmentName} jobs
 humanoid-profile-editor-antags-tab = Antags