separate build for servers

docs/model-server/readme.md

docs/volume-server/README.md

package.json

src/mol-plugin-ui/controls/icons.tsx

src/mol-plugin-ui/controls/parameters.tsx

src/mol-plugin-ui/skin/base/base.scss

src/mol-plugin-ui/skin/base/components/controls-base.scss

src/mol-plugin-ui/skin/base/icons.scss

src/mol-plugin-ui/structure/measurements.tsx

src/servers/tsconfig.json

tsconfig.json