Refactor the UI and data structure of `@atrilabs/app-page-layer`

[cruxcode]

Steps:

1. Read the developer documentation.
2. Go through the hooks already implemented in the @atrilabs/app-page-layer/src/hooks. The hooks will explain how to interact with the editor's state machine and also how to use canvasApi.navigate. You won't need to change the code in the hook.
3. Inside the @atrilabs/app-page-layer/src/PageTree.tsx:

• Write a code to format the pageInfo data received into a tree format suited for use with this tree component from ant design.
• Use this tree component from ant design.

How to detect if a route is a directory too?

If the equation unixFilepath = routeObjectPath + "/index.(js|jsx|ts|tsx)" holds true, then, there is a directory at routeObjectPath.

Sample Tree

pages
[page_icon  ] \                                                                                      # /pages/index.jsx file
[page_icon  ] careers                                                                          # /pages/careers.jsx file
[folder_icon] offices                                                                           # a folder without an index.jsx file
                       [page_icon] India                                                         # /pages/offices/India.jsx file
                       [page_icon] USA                                                          # /pages/offices/USA.jsx file
[folder_icon] blogs                                                                             # a folder with index.jsx file
                       [page_icon  ] \                                                             # index.js route
                       [page_icon  ] react                                                     # /pages/blogs/react.jsx file
                       [folder_icon] atri                                                        # /pages/blogs/atri.jsx file
                                              [page_icon  ] ui
                                              [page_icon  ] python backend