Use Component Resources for Abstraction

This rule applies to files matching the patterns above.

# Use Component Resources for Abstraction

## Rule
Any group of related resources that represents a logical unit (VPC, database cluster, application service) MUST be encapsulated as a ComponentResource with typed inputs and outputs.

## Good Examples
```typescript
// Component resource — clean interface
const vpc = new Vpc("production", {
  cidrBlock: "10.0.0.0/16",
  azCount: 3,
  enableNatGateway: true,
});

const database = new DatabaseCluster("main", {
  vpcId: vpc.vpcId,
  subnetIds: vpc.privateSubnetIds,
  engine: "postgres",
  engineVersion: "16",
  instanceClass: "db.r6g.large",
});

const app = new WebService("api", {
  vpcId: vpc.vpcId,
  subnetIds: vpc.privateSubnetIds,
  image: "myapp/api:2.0",
  port: 8080,
  databaseUrl: database.connectionString,
});
```

## Bad Examples
```typescript
// BAD: Flat list of primitives (no abstraction)
const vpc = new aws.ec2.Vpc("vpc", { cidrBlock: "10.0.0.0/16" });
const subnet1 = new aws.ec2.Subnet("sub1", { vpcId: vpc.id, cidrBlock: "10.0.1.0/24" });
const subnet2 = new aws.ec2.Subnet("sub2", { vpcId: vpc.id, cidrBlock: "10.0.2.0/24" });
const igw = new aws.ec2.InternetGateway("igw", { vpcId: vpc.id });
const rt = new aws.ec2.RouteTable("rt", { vpcId: vpc.id });
// ... 20 more resources with no grouping
```

## Component Resource Template
```typescript
interface MyComponentArgs {
  // Typed inputs
}

class MyComponent extends pulumi.ComponentResource {
  public readonly output1: pulumi.Output<string>;

  constructor(name: string, args: MyComponentArgs, opts?: pulumi.ComponentResourceOptions) {
    super("custom:category:MyComponent", name, {}, opts);

    // Create child resources with { parent: this }

    this.registerOutputs({ output1: this.output1 });
  }
}
```

## When to Create a Component
- 3+ resources that are always created together
- Resources with a clear logical grouping (network, database, service)
- Patterns you want to reuse across stacks or projects
- Infrastructure that would benefit from unit testing

## Enforcement
- Code review: flag flat resource lists that should be components
- Pulumi Automation API for programmatic validation