feat: network spec schema and validation

[hojmark]

• JSON schema for network spec YAML validation
• New drift lint command to validate spec files against the schema
  • Ensure it works with AOT
• Editor auto-completion using convention based "integration" (VS Code, JetBrains editors, etc.)

Editor usage

# yaml-language-server: $schema=https://raw.githubusercontent.com/hojmark/drift/refs/heads/main/src/Spec/embedded_resources/schemas/drift-spec-v1-preview.schema.json

network:
  ...

Command usage

drift lint my-network