feat: expose trading approvals state (DEV-565)

[kartojal]

Summary

• add typed trading approval state models
• add signer-free wallet reads to sync and async public clients
• add authenticated-wallet convenience reads to sync and async secure clients
• reuse the canonical approval-state resolver in setup_trading_approvals
• add a deterministic read-only integration test

Related: Polymarket/ts-sdk#286
Linear: DEV-565

Testing

• full non-integration suite: 2,233 passed, 185 deselected
• read-only live integration: 1 passed
• Ruff lint and format checks
• strict Pyright: 0 errors

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Note

Medium Risk
Changes the approval resolution path used by setup_trading_approvals and adds RPC reads for collateral/position operator allowances; behavior should match prior logic but touches trading prerequisites.

Overview
Adds typed trading approval state (TradingApprovalsState, MissingTradingApprovals, and per-token ERC-20/ERC-1155 entries) and splits on-chain approval logic into read state vs build transaction calls (get_trading_approvals_state / build_missing_trading_approval_calls), replacing the old all-in-one resolve_missing_trading_approval_* helpers.

Public sync/async clients gain an RPC transport and get_trading_approvals_state(wallet=...) so any wallet can be checked without a signer. Secure clients expose the same read with an optional wallet (defaulting to the authenticated wallet). setup_trading_approvals now resolves missing approvals via the shared state reader, then submits only the needed calls. New types are exported from the package root; a read-only integration test asserts expected missing approval counts for a known unapproved address.

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[naruto11eth]

lgtm as a PR