Add prettier support

package.json

packages/app-shell/.prettierignore

packages/app-shell/.prettierrc.json

packages/app-shell/package.json

packages/auth/.prettierignore

packages/auth/.prettierrc.json

packages/auth/package.json

packages/check-in-place-select/.prettierignore

packages/check-in-place-select/.prettierrc.json

packages/check-in-place-select/package.json

packages/common/.prettierignore

packages/common/.prettierrc.json

packages/common/package.json

packages/data-table-view/.prettierignore

packages/data-table-view/.prettierrc.json

packages/data-table-view/package.json

packages/file-handling/.prettierignore

packages/file-handling/.prettierrc.json

packages/file-handling/package.json

...ages/knowledge-base-web-page-element-view/.prettierignore