feat: Add GatherManager + AutoDoors plugin config modules

- GatherManager: 2-tab editor (Resource Rates with 1x-10x presets,
  Advanced with Pickup/Quarry/Excavator/Survey modifiers), 9 resource
  types with slider+number inputs, CRUD + deploy + import via NATS
- AutoDoors: Global settings (delay sliders, 6 toggles), 7 door type
  toggles, permission group overrides table, CRUD + deploy + import
- DB: migrations 015 (gather_configs) + 018 (autodoors_configs)
- Backend: GatherModule + AutoDoorsModule registered in app.module.ts
- Frontend: Pinia stores, Vue views, router routes, sidebar nav items
- Icons: Pickaxe (gather), DoorOpen (autodoors)
- All type checks pass: tsc + vue-tsc zero errors

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-nest/src/modules/gather/dto/create-gather-config.dto.ts

@@ -0,0 +1,19 @@
+import { IsString, IsOptional, IsObject, MaxLength } from 'class-validator';
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+
+export class CreateGatherConfigDto {
+  @ApiProperty({ example: 'Default 2x Rates' })
+  @IsString()
+  @MaxLength(100)
+  config_name: string;
+
+  @ApiPropertyOptional({ example: 'Standard 2x gather rates' })
+  @IsString()
+  @IsOptional()
+  description?: string;
+
+  @ApiPropertyOptional()
+  @IsObject()
+  @IsOptional()
+  config_data?: Record<string, any>;
+}