chore: cleanup dead code + format with Pint

- Remove unused FeaturesController (empty stubs, no routes)
- Remove ConvertSpatialFile CLI command (unused; service used in LayerManager)
- Remove MigrateGeojsonToFeatures CLI command (one-shot migration, not referenced)
- Remove .claude/worktrees/ (11 old agent worktrees from June)
- Apply Laravel Pint formatting across 219 files (style only, no functional changes)

Tests: 101 passing (319 assertions)
API routes: unchanged (8 routes intact)

tests/Feature/ProjectAssignmentsTest.php

@@ -19,6 +19,7 @@ class ProjectAssignmentsTest extends TestCase
     use RefreshDatabase;
 
     private User $admin;
+
     private Project $project;
 
     protected function setUp(): void