Resolve "Refactor project structure"

Closes #74 (closed)

Proposed changes

Refactor project structure as following:

Folder structure

• components
  • dialogs
  • fragments
  • pages
• guards
• interceptors
• models
• services
  • http
  • util

Naming

• Component names should follow the following rules:

[what-it-is]-[what-it-does] e.g. room-create

• For pages, add the suffix Page to the component's name

[what-it-is]-page e.g. login-page