Projects (#192)

* Add file save UI and drafts project

* Fix build

* Create SearchList component as abstraction

* Add project page and file tree view

* Create Locale context

* Create Theme context

* Create Version context

* Create Title context

* Create Project context

* Store current file in project context

* Fix issues when renaming file and implement deleting

* Style improvements

* Make all project strings translatable

* Fix z-index

src/app/contexts/index.ts

@@ -0,0 +1,5 @@
+export * from './Locale'
+export * from './Project'
+export * from './Theme'
+export * from './Title'
+export * from './Version'