ANS-15 docs(quick-start-guide) Add comprehensive Quick Start Guide for ANS SDKs

Introduce a new `QUICK_START_GUIDE.md` to provide a comprehensive and Beginner-Friendly guide for getting started with the Agent Network System (ANS) SDKs.

This initial version covers:
- **JavaScript/TypeScript SDK:** Instructions for installation, agent registration, and lookup, including programmatic usage and CLI examples.
- **Java SDK:** Two distinct, easy-to-follow options for setup and usage:
- **Maven Dependency Approach:** Guides users through setting up a new Maven project with a complete `pom.xml` and `Main.java` example for agent registration and lookup.
- **Git Clone and Local Build Approach:** Provides steps for cloning the ANS repository, building the Java SDK locally, and using the `anslookup` command-line tool directly from the built JAR.
- **Key Handling Guidance:** Includes crucial information on securely managing cryptographic keys generated by the SDK.

The guide aims to provide robust, copy-pasteable examples to ensure users can quickly get started with ANS agent development.

Author: gulercan