feat: Add FRI-based commitment scheme

[ToufeeqP]

Pull Request type

• Feature

Description

Adds support for FRI-based polynomial commitment scheme. Updated header to support both KZG & FRI commitment scheme. Each commitment scheme can have its own version of a header. The commitment scheme can be switched by changing a Runtime constant via RTU.

Companion PRs:

avail-core: PR #113
avail-rust: PR #61
avail-apps: PR #104
da-spammer: PR #2

Testing Performed

Checklist

• I have performed a self-review of my own code.
• The tests pass successfully with cargo test.
• The code was formatted with cargo fmt.
• The code compiles with no new warnings with cargo build --release and cargo build --release --features runtime-benchmarks.
• The code has no new warnings when using cargo clippy.
• If this change affects documented features or needs new documentation, I have created a PR with a documentation update.