feat(perps-controller): add UI-safe subpath exports for formatters, calculations, constants

[abretonc7s]

Explanation

The @metamask/perps-controller package currently exposes a single entry point that transitively loads the HyperLiquid SDK, which pulls in the ESM-only @noble/hashes package. In CJS Jest environments where consumers have not customized transformIgnorePatterns, importing anything from this package forces them to configure Babel/Jest transforms for @noble/hashes, or their test suites break.

This PR adds three new UI-safe subpath exports so consumers can import pure formatting/calculation utilities without triggering the SDK chain:

• @metamask/perps-controller/formatters → perpsFormatters
• @metamask/perps-controller/calculations → orderCalculations
• @metamask/perps-controller/constants → perpsConfig

Each entry exports both ESM (.mjs / .d.mts) and CJS (.cjs / .d.cts) artifacts matching the existing . export shape.

References

N/A

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
Low risk: this only adds new package.json export entrypoints and a changelog note, without changing runtime logic. Main risk is misconfigured export paths/types causing consumer import or build failures.

Overview
Adds UI-safe subpath exports for @metamask/perps-controller (./formatters, ./calculations, ./constants, ./constants/hyperliquid) so consumers can import formatting/calculation utilities and config without pulling in the HyperLiquid SDK (and its ESM-only transitive deps) in CJS/Jest environments.

Updates the package changelog to document these new entrypoints.

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