feat: add layered analysis support

[tembleking]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces layered analysis support for container image scanning, enabling per-layer vulnerability reporting and enhanced diagnostics for Dockerfiles.

• Implements conversion from SysdigImageScannerReport to a new image scan result structure with per-layer details.
• Updates diagnostic functions and tests to account for individual layer vulnerabilities.
• Adds a new Dockerfile parser and updates docs and versioning to reflect these changes.

Reviewed Changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/infra/sysdig_image_scanner_result.rs	Adds conversion logic to include layer-based vulnerability information
src/infra/sysdig_image_scanner.rs	Simplifies scan_image using the new conversion, removing deprecated logic
src/infra/dockerfile_ast_parser.rs	Introduces a new Dockerfile parser to support detailed layered analysis
src/infra/docker_image_builder.rs	Cleans up commented-out logging code and uses a build_info variable for image IDs
src/app/image_scanner.rs	Updates ImageScanResult and related types to support a vector of vulnerabilities
src/app/commands.rs	Updates diagnostic reporting to include layered vulnerability details
docs/features/ and README.md	Updates documentation to include layered analysis support
Cargo.toml	Bumps version from 0.4.1 to 0.5.0

Files not reviewed (1)

• tests/fixtures/Dockerfile: Language not supported

[Copilot]

Using unwrap() here may lead to a panic if report.result is None. Consider handling the None case explicitly.

Suggested change

	let layers = layers_for_result(report.result.as_ref().unwrap());
	ImageScanResult {
	vulnerabilities,
	is_compliant,
	layers: layers.unwrap_or_default(),
	let layers = report
	.result
	.as_ref()
	.and_then(|result| layers_for_result(result))
	.unwrap_or_default();
	ImageScanResult {
	vulnerabilities,
	is_compliant,
	layers,