Add Anchor CPI example for pool initialization with tests

[franRappazzini]

This pull request adds a complete example project, cpi-example-damm-v2, demonstrating how to initialize a Meteora DAMM v2 pool via CPI (Cross-Program Invocation) on Solana devnet using Anchor and TypeScript. The changes include Rust and TypeScript source code, configuration files, dependencies, a comprehensive README, and test scripts to provide a ready-to-use template for similar integrations.

The most important changes are:

Core Program and Integration:

• Added a new Anchor program in Rust (programs/cpi-example-damm-v2/src/lib.rs) that exposes a cpi_initialize_pool instruction, allowing CPI into the Meteora DAMM v2 protocol to initialize a pool, with all required account validations and cross-program invocation logic.
• Added a TypeScript test suite (tests/damm_v2.test.ts) that demonstrates end-to-end pool initialization and state verification using the Anchor and Meteora SDKs.

Project Setup and Configuration:

• Added project configuration files: Anchor.toml, Cargo.toml, and package.json to specify toolchain, dependencies, build scripts, and workspace members for both Rust and TypeScript environments. [1] [2] [3] [4] [5] [6]
• Added a migration deploy script (migrations/deploy.ts) as a template for Anchor migrations.

Documentation:

• Added a detailed README.md with setup instructions, prerequisites, test and deployment steps, and troubleshooting tips for running the example on Solana devnet.