feat: Initiate observables-connect package

[rossbulat]

This PR introduces a new package, observables-connect to abstract extensions discovery from React. Instead, react-connect-kit now relies on this new package by subscribing to these observables and updating its extension state when extensions are discovered.

This PR paves the way to decoupling all API state from React components, allowing dapps like staking dashboard to be more flexible with their data management.

[Copilot]

Copilot reviewed 20 out of 26 changed files in this pull request and generated 1 comment.

Files not reviewed (6)

• builder/package.json: Language not supported
• library/factories/package.json: Language not supported
• library/hooks/package.json: Language not supported
• library/observables-connect/package.json: Language not supported
• library/observables-connect/tsconfig.json: Language not supported
• library/react-connect-kit/package.json: Language not supported

Comments suppressed due to low confidence (1)

builder/src/builders/observables-connect/index.ts:22

• Throwing a plain string instead of an Error object may hinder debugging and stack trace visibility. Consider throwing an Error instance (e.g. throw new Error('Prebuild failed.')) to improve error handling.

if (!(await prebuild(folder))) { throw `Prebuild failed.` }

[Copilot]

Copilot reviewed 20 out of 26 changed files in this pull request and generated 1 comment.

Files not reviewed (6)

• builder/package.json: Language not supported
• library/factories/package.json: Language not supported
• library/hooks/package.json: Language not supported
• library/observables-connect/package.json: Language not supported
• library/observables-connect/tsconfig.json: Language not supported
• library/react-connect-kit/package.json: Language not supported

Comments suppressed due to low confidence (2)

library/react-connect-kit/src/types.ts:4

• Please verify that the exported types from '@w3ux/types' fully match the previously used local definitions to ensure all usages in react-connect-kit remain compatible.

import type { ExtensionInjected, ExtensionInterface } from '@w3ux/types'

library/react-connect-kit/src/ExtensionsProvider/index.tsx:52

• Confirm that the imported 'canConnect' function from '@w3ux/observables-connect/extensions' accurately reflects the previous logic (i.e. checking installation and connection status) to avoid unexpected scenarios.

const extensionCanConnect = (id: string): boolean => canConnect(id)