feat(new construct): aws-networkfirewall-vpc

The construct being purposed is an integration of AWS Firewall Manager into a VPC to either inspect all intra-subnet traffic or just internet egress/ingress traffic.

### Use Case

A user would like an accelerated way to integrate AWS Network Firewall into their workload to take advantage of traffic inspection.

### Proposed Solution

This illustrates the services used to create a VPC with intra-subnet inspection and two private subnets. The overall architecture will vary depending on the parameters specified such as: number of subnets, number of AZs and intra-subnet vs internet egress/ingress inspection.


* [X ] :wave: I may be able to implement this feature request
* [ ] :warning: This feature might incur a breaking change

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This is a :rocket: Feature Request

No source files or tests are named in the issue. Start by reviewing the repository's AWS CDK construct patterns and the services needed for AWS Network Firewall integration. Done should cover configurable subnet and Availability Zone counts plus intra-subnet or internet ingress/egress inspection, with the architecture validated against the proposed use case.

Written by the indexing model from the issue text.