fix: move cdylib to separate float-wasm crate

[JuaniRios]

Summary

• Remove cdylib from crate-type in crates/float/Cargo.toml, keeping only rlib
• Add a separate float-wasm crate (crates/float-wasm/) as the WASM build target

Problem

Having crate-type = ["rlib", "cdylib"] causes Cargo to compile alloy_primitives as two separate crate instances, causing type mismatches for downstream crates:

expected `FixedBytes<32>`, found a different `FixedBytes<32>`
note: two different versions of crate `alloy_primitives` are being used

See: rust-lang/cargo#6313

Fix

The cdylib target is moved to a separate float-wasm wrapper crate (crates/float-wasm/).

Summary by CodeRabbit

• New Features

  • Added WebAssembly (WASM) build target for the float library, enabling use in browser environments and JavaScript applications.

• Chores

  • Reorganized library build configuration to better support multiple deployment targets by separating the core library from the WASM wrapper build.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 32fcce9e-aa53-4b52-accd-b1b16b6bcbc4

📥 Commits

Reviewing files that changed from the base of the PR and between 50aa96e and 83033e2.

📒 Files selected for processing (3)

• crates/float-wasm/Cargo.toml
• crates/float-wasm/src/lib.rs
• crates/float/Cargo.toml

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Walkthrough

A new WASM wrapper crate (rain-math-float-wasm) is introduced with separate crate manifest and module exports. The existing float crate's crate-type is modified from ["rlib", "cdylib"] to ["rlib"], delegating CDYLIB compilation to the new wrapper crate.

Changes

Cohort / File(s)	Summary
WASM Wrapper Crate crates/float-wasm/Cargo.toml, crates/float-wasm/src/lib.rs	New WASM/CDYLIB crate manifest defining package metadata with rlib dependency on the core float library. The lib.rs file re-exports all public items from rain_math_float via pub use rain_math_float::*;.
Core Float Library Configuration crates/float/Cargo.toml	Removes "cdylib" from the lib crate-type declaration, leaving only "rlib" for the core library build.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: moving cdylib compilation from the core float crate to a separate float-wasm crate, which directly addresses the root cause of the type mismatch issue.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/remove-cdylib

📝 Coding Plan

• Generate coding plan for human review comments

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