Restrict exports

[Yolley]

Currently we allow importing from dist and also do not re-export sum useful modules from namespaces, so it requires our users to import from dist like so import {IChain} from '@streamflow/stream/dist/common/types.

We should make restricted exports in package.json like so

  "exports": {
    ".": "./dist/index.js",
    "./aptos": "./dist/aptos/index.js",
    "./evm": "./dist/evm/index.js",
    "./solana": "./dist/solana/index.js",
    "./sui": "./dist/sui/index.js"
  },
  "typesVersions": {
    "*": {
      ".": [
        "./dist/index.d.ts"
      ],
      "aptos": [
        "./dist/aptos/index.d.ts"
      ],
      "evm": [
        "./dist/evm/index.d.ts"
      ],
      "solana": [
        "./dist/solana/index.d.ts"
      ],
      "sui": [
        "./dist/sui/index.d.ts"
      ]
    }
  },

It will be a major release