replaces the CRC32 and CRC32C implementations

[shinyoshiaki]

This pull request replaces the CRC32 and CRC32C implementations used in the STUN and SCTP modules with a unified, ESM-compatible, and type-safe solution. The main change is the removal of legacy dependencies (buffer-crc32 and turbo-crc32) in favor of a new, TypeScript-friendly implementation in packages/common. This improves build compatibility, type safety, and maintainability across the codebase.

Dependency and Compatibility Improvements

• Removed buffer-crc32 and turbo-crc32 dependencies from packages/ice, packages/sctp, and packages/webrtc, and replaced them with a new internal implementation for CRC32/CRC32C in packages/common/src/crc.ts. This ensures ESM and TypeScript compatibility throughout the project. [1] [2] [3] [4]

Core Implementation Changes

• Added a new crc.ts module in packages/common providing pure TypeScript implementations for both CRC32 and CRC32C, supporting Buffer, Uint8Array, and string inputs.
• Updated exports in packages/common/src/index.ts to include the new CRC utilities.

Refactoring of CRC Usage

• Refactored STUN FINGERPRINT calculation in packages/ice/src/stun/message.ts to use the new crc32 function, removing the need for @ts-ignore and buffer XOR logic. [1] [2]
• Refactored SCTP checksum calculation in packages/sctp/src/chunk.ts to use the new crc32c function.

Documentation and Task Tracking

• Added a detailed task and implementation rationale in TICKET-ticket-b6bc5609-0a50-4bca-a29c-4e129c1f1f87.md, outlining the motivation, technical approach, and test coverage for this migration.