refactor(sdk-core): unify sysio contracts behind a generated proxy

[joshglogau]

Summary

Refactors the SDK’s system-contract integration around a single generated, strongly typed sysio proxy modeled after Wire Tools’ getSysioContract design.

The proxy now exposes every contract defined in SysioContractDefinitions through one consistent interface:

• actions.<name>.prepare(...)
• actions.<name>.invoke(...)
• tables.<name>.query(...)
• tables.<name>.rows(...)
• tables.<name>.first(...)
• tables.<name>.scopes(...)

What changed

• Added a root proxy through contracts.sysio.createClient({ client }).
• Added direct dynamic lookup through getSysioContract(name).
• Derives contract, action, table, request, and response types from the generated SysioContractMapping.
• Validates contract members against generated definitions at runtime.
• Lazily creates and caches contract, action, and table clients.
• Supports contract account overrides for nonstandard deployments.
• Uses local codecs only where synchronous Action encoding is required.
• Falls back to a typed AnyAction when local encoding is unavailable so APIClient can resolve the deployed ABI.
• Requires explicit authorization instead of guessing a write authority.
• Forwards transaction options directly to APIClient.pushTransaction.
• Keeps AuthEx, multisig, and reserve clients as focused domain facades built on top of the shared proxy.

Cleanup

• Removed duplicated AuthEx, multisig, and reserve descriptors.
• Removed the legacy named createClient({ name }) factory.
• Removed callable action aliases in favor of the consistent prepare/invoke interface.
• Removed redundant facade wrappers and unused runtime serializers.
• Centralized the remaining synchronous codecs in one typed registry.
• Separated generic descriptor-client tests from generated sysio-proxy tests.

Example

import { contracts, SysioContracts } from "@wireio/sdk-core"

const sysio = contracts.sysio.createClient({ client: api })

const msig = sysio.msig
const epoch = sysio.getSysioContract(
  SysioContracts.SysioContractName.epoch
)

const action = msig.actions.approve.prepare(
  {
    proposer: "alice",
    proposal_name: "upgrade1",
    level: {
      actor: "bob",
      permission: "active"
    },
    proposal_hash: null
  },
  {
    authorization: ["bob@active"]
  }
)

await epoch.actions.advance.invoke(
  {},
  {
    authorization: ["operator@active"]
  }
)

const proposals = await msig.tables.proposal.query({
  scope: "alice"
})

Verification

• SDK TypeScript compilation passes.
• Strict-null typecheck passes.
• Repository-wide ESLint passes.
• All 527 SDK tests pass across 48 test suites.