Bump revm 25 -> 36

[thedavidmeister]

Unifies rain-math-float on the same revm major as rain-forker / rainlang-eval. Without this, a consumer like raindex links two revm versions (25 + 36), whose two revm_precompile builds emit duplicate c-kzg/blst/secp256k1 C symbols and the linker (cc/ld) fails.

• revm 36 dropped the pure-Rust kzg-rs feature; the wasm target uses no KZG backend (DecimalFloat doesn't use the point-evaluation precompile).
• evm.rs uses the MainnetEvm type alias (the Evm struct gained a 5th generic in revm 36).
• alloy bumps to 1.8.3 to align with revm 36's alloy-core.

Native tests pass (112) and the wasm build compiles.

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 06cd6838-0d8b-4853-a1fc-ebb8bd3341e3

📥 Commits

Reviewing files that changed from the base of the PR and between 69c7f9e and 67155a1.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (3)

• Cargo.toml
• crates/float/Cargo.toml
• crates/float/src/evm.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 2026-05-28-revm-36

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@coderabbitai assess this PR size classification for the totality of the PR with the following criterias and report it in your comment:

S/M/L PR Classification Guidelines:

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Review Effort: Would have taken 5-10 minutes

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