Add residence sharing via .casera files

- Add SharedResidence model and package type detection for .casera files
- Add generateSharePackage API endpoint integration
- Create ResidenceSharingManager for iOS and Android
- Add share button to residence detail screens (owner only)
- Add residence import handling with confirmation dialogs
- Update Quick Look extensions to show house icon for residence packages
- Route .casera imports by type (contractor vs residence)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

iosApp/iosApp/Localizable.xcstrings

@@ -17348,10 +17348,6 @@
       "comment" : "The text on a button that triggers the import action.",
       "isCommentAutoGenerated" : true
     },
-    "Import Contractor" : {
-      "comment" : "The title of an alert dialog that appears when a user attempts to import a contractor.",
-      "isCommentAutoGenerated" : true
-    },
     "Import Failed" : {
       "comment" : "A dialog title when importing a contractor fails.",
       "isCommentAutoGenerated" : true
@@ -17368,9 +17364,16 @@
       "comment" : "A title for the registration screen.",
       "isCommentAutoGenerated" : true
     },
+    "Join Failed" : {
+      "comment" : "An alert title displayed when joining a residence fails.",
+      "isCommentAutoGenerated" : true
+    },
     "Join Residence" : {
       "comment" : "A button label that allows a user to join an existing residence.",
       "isCommentAutoGenerated" : true
+    },
+    "Joined Residence" : {
+
     },
     "Joining residence..." : {
       "comment" : "A message displayed while waiting for the app to join a residence.",
@@ -24606,6 +24609,10 @@
       "comment" : "A label displayed above the share code section of the view.",
       "isCommentAutoGenerated" : true
     },
+    "Share Failed" : {
+      "comment" : "An alert title that appears when sharing a file fails.",
+      "isCommentAutoGenerated" : true
+    },
     "Share this code with others to give them access to %@" : {
       "comment" : "A caption below the share code, explaining that it can be shared with others to give them access to a residence. The argument is the name of the residence.",
       "isCommentAutoGenerated" : true
@@ -29683,8 +29690,8 @@
       "comment" : "The title of the welcome screen in the preview.",
       "isCommentAutoGenerated" : true
     },
-    "Would you like to import this contractor to your contacts?" : {
-      "comment" : "A message displayed in an alert when a user imports a contractor.",
+    "You now have access to %@." : {
+      "comment" : "A message displayed when a user successfully imports a residence, indicating that they now have access to it. The argument is the name of the residence that was imported.",
       "isCommentAutoGenerated" : true
     },
     "You now have full access to all Pro features!" : {