Migrate js clients

[kb-kerem]

Migrate js clients to GitHub

Issue : IRIS-890

Description

Moves the sauce visual js clients to GitHub.
Introduces changesets and lerna for monorepo release management.

Summary of work done

• Copied the latest js source code (as of 16.05) version: 0.3.449
• Removed Dockerfile, skaffold.yml and .dockerignore as they’re not required
• Introduced lerna for monorepo management
• Introduced changesets for release management
• Manually changed versions of all sdk’s to 0.3.0 in package.json files, including dependency to saucelabs/visual
• Removed visual-wdio-example, visual-nightwatch-example and visual-cypress-example projects as they are not required. Removed references to them in yarn workspace.
• Aligned “test” scripts for all sdks. nightwatch and cypress now have scripts called test
• Prepared the build pipeline: .github/js-build.yml
• Prepared the release pipeline: .github/js-release.yml