This will help with the encapsulation/reusability of each component.
* Stylesheets were renamed to reflect their respective component name
(e.g. search.less became SearchBox.less)
* Styles were isolated to each component:
* navigation.less now only contains classes that are relevant to
Navigation.mustache.
* personalNavigation.less, search.less, and tabs.less
imports were removed and made first-class styles.
* several selectors were moved into common.less
* #p-logo was moved into sidebar
* tabs.less was renamed to VectorTabs.less and styles specific to
VectorMenu.less were put into VectorMenu.less
* Storybook was updated to reflect changes
Bug: T243281
Change-Id: Idf90ee2a0f1c1d08a31cf50099c0bebc7b67e619
