Add examples directory for advanced usage

Author: rotemreiss

examples/README.md

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+# Malifiscan Examples
+
+This directory provides advanced usage examples and configurations for Malifiscan, demonstrating different deployment scenarios and use cases beyond the basic setup.
+
+## Available Examples
+
+### config.shai-hulud-2.0.yaml
+
+An example configuration that uses a hard-coded list of malicious packages instead of the default OSV feed. This demonstrates how to use the memory feed provider with a specific set of packages.
+
+**Use Case**: Testing against a known set of malicious packages from security research.
+
+**Package List Source**: This example includes packages identified in the [Shai-Hulud 2.0 supply chain attack research by Wiz](https://www.wiz.io/blog/shai-hulud-2-0-ongoing-supply-chain-attack).
+
+**Features**:
+- Memory-based feed provider with pre-defined package list
+- JFrog registry integration enabled
+- Minimal logging (ERROR level only)
+- Storage service disabled for lightweight operation
+
+**Usage**:
+```bash
+uv run python cli.py scan --config examples/config.shai-hulud-2.0.yaml
+```