Optimize bcrs-shared-components

## What is the problem?
* When we implement bcrs-shared-components staff comment in FAS UI, we found some issues.
Parent application must have following folders/files
app/src/assets/styles/theme.scss
app/src/mixins/index.ts
app/src/interfaces/index.ts

## What is the impact?
* When some one is trying to use bcrs-shared-components they have to create these folder to work components

## Proposed solution
* Create production ready build
Lerna support Rollup to build/minfy and extract css individual component. (Need to do a research)
### Alternate approch
use common scss and convert to css on build, import in project
use utils instead of mixins.