chore(settings): support more than 3 lines (#53)

* chore(settings): support more than 3 lines
* chore: add confirm dialog
* chore: update example script
* chore: rm config override
* Fix spacing issues, disallow deletion of last line, fix issue where deleting lines 2 and 3 would keep them in the list, cleanup onDelete and onAppend method locations
* Initialize default settings with two empty lines

---------

Co-authored-by: Matthew Breedlove <sirmalloc@gmail.com>

scripts/payload.example.json

@@ -0,0 +1,25 @@
+{
+  "hook_event_name": "Status",
+  "session_id": "abc123...",
+  "transcript_path": "/path/to/transcript.json",
+  "cwd": "/current/working/directory",
+  "model": {
+    "id": "claude-opus-4-1",
+    "display_name": "Opus"
+  },
+  "workspace": {
+    "current_dir": "/current/working/directory",
+    "project_dir": "/original/project/directory"
+  },
+  "version": "1.0.80",
+  "output_style": {
+    "name": "default"
+  },
+  "cost": {
+    "total_cost_usd": 0.01234,
+    "total_duration_ms": 45000,
+    "total_api_duration_ms": 2300,
+    "total_lines_added": 156,
+    "total_lines_removed": 23
+  }
+}