chore: Renaming Classes and variables SDK -> Connect

[adonesky1]

Refactor: Rename SDK to Connect

Summary

Migrates terminology from "SDK" to "Connect" across sdk-multichain and sdk-multichain-ui packages in preparation for the new connect package.

Changes

• Classes: MultichainSDK → MultichainConnect
• Types: SDKState → ConnectState, SDKEvents → ConnectEvents
• Functions: createMetamaskSDK → createMetamaskConnect
• Components: SDKVersion → ConnectVersion
• Properties: sdkVersion → connectVersion
• Build config: Global names updated (MetaMaskSDK → MetaMaskConnect)
• Documentation: Updated to use "MetaMask Connect Module" terminology

---

Note

Renames SDK to Connect across core, UI, APIs, build artifacts, and tests, including types, props, logger namespaces, globals, and docs.

• Core/Domain:
  • Rename MultichainSDK → MultichainConnect, SDKState → ConnectState, SDKEvents → ConnectEvents.
  • Update public factory createMetamaskSDK → createMetamaskConnect in index.*.
  • Change metadata key metadata.sdk → metadata.connect and logger namespaces metamask-sdk:* → metamask-connect:*.
• UI (Web/RN/Node):
  • Replace component SDKVersion → ConnectVersion and prop sdkVersion → connectVersion across mm-install-modal and mm-otp-modal.
  • Update web modal mounting to set connectVersion and example index.html attribute/title.
  • UMD global name for UI build MetaMaskSDKInstallModal → MetaMaskConnectInstallModal.
• Build/Packaging:
  • Change browser IIFE global MetaMaskSDK → MetaMaskConnect in tsup.config.ts and related rollup configs.
  • Adjust package descriptions from "SDK" to "Connect".
• Tests:
  • Align types, factories, props, log namespaces, and expectations with "Connect" naming.
• Docs:
  • Update READMEs and terminology to "MetaMask Connect Module".

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