Update main README.md and path to tokens

[SashaPimenov]

I encountered an issue while trying to deploy your project locally (Windows 11, Node.js 16.20.0) following your main README file.

During the yarn workspace @open-condo/ui build stage, the build failed with the following errors:

No properties for variables.less. File not created.
No properties for variables.css. File not created.

To resolve this, I had to modify two lines in packages/ui/bin/buildStyleVars/runner.js:

const TOKENS_DIR = path.join(__dirname, '../..', 'src/tokens')
const SOURCE_PATH = path.join(TOKENS_DIR, 'sets/*.json')

These lines needed to be changed to:

const TOKENS_DIR = path.join(__dirname, '..', '..', 'src', 'tokens')
const SOURCE_PATH = path.join(TOKENS_DIR, 'sets', '*.json').replace(/\\/g, '/')

Additionally, before running yarn workspace @app/condo build, it's necessary to execute the following commands:

yarn workspace @open-condo/miniapp-utils build
yarn workspace @open-condo/apollo build

Please update the main README file to reflect these changes.