Fix #145: Remove encodePermissionContexts and decodePermissionContexts functions from public interface

[patchy-the-bot]

Summary

Fixes #145 by removing encodePermissionContexts and decodePermissionContexts functions from the public API. These functions were confusing in terminology (mixing "Permission Context" with delegation concepts) and provided minimal value as they were just forEach wrappers around the core encodeDelegations/decodeDelegations functions.

Changes

• Removed functions: Deleted encodePermissionContexts and decodePermissionContexts implementations and JSDoc comments from delegation.ts
• Updated exports: Removed function exports from utils/index.ts barrel file
• Replaced usage: Updated all call sites to use encodeDelegations directly with Array.map() instead of the wrapper functions
• Test cleanup: Removed dedicated test suites for both removed functions from delegation.test.ts

Files modified: delegation.ts, utils/index.ts, delegation.test.ts, delegateAndRedeem.test.ts, redeemDelegations.ts, write.ts

Testing

• All existing tests pass with the updated encodeDelegations usage
• Removed 68 test cases specific to the deprecated functions
• E2E tests continue to work with direct encodeDelegations calls
• Build and lint checks pass successfully

The API is now cleaner with consistent terminology focused on "delegations" rather than mixing "permission contexts".

Fixes #145

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Note

Medium Risk
API surface change may break downstream consumers still importing encodePermissionContexts/decodePermissionContexts. Runtime risk is otherwise low since the new encoding is equivalent map-based wiring.

Overview
Removes the confusing encodePermissionContexts/decodePermissionContexts helpers from the @metamask/smart-accounts-kit public utils surface and switches callers to directly encode each delegation chain via encodeDelegations.

Updates redeemDelegations encoding/simulation and write.redeemDelegations to build the on-chain args with delegations.map(encodeDelegations), and adjusts the delegator E2E tests accordingly.

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