[EPIC] Create untitled theme

[elboletaire]

Some of the following require the final definition of colors, which we don't have yet. For that reason, components related to the color scheme are after the ones not requiring it.

The list's created this way so you can split it into multiple issues. Note each section requires both the light and dark variants to be done before merging.

• Style Tables #846
• Style Forms #848
  • Style Inputs
    Note this includes all input variants, like having side elements and errors.
  • Style Checkboxes
    Note: checkboxes are squared :)
  • Style Radio buttons
    Note: radio buttons are rounded :)
  • Style input dropdowns
  • Style file uploaders
• Style pagination
• Style Tabs
• Typography styles (titles, texts, text links, lists...)
• Style Tags
• Style Badges
• Style Dropdowns
• Style Alerts

Require a defined color scheme:

• Style Buttons
• Ensure color scheme does not break already built components (tags, badges, tabs, checkboxes, radios...)

Pages and sections (require all the above):

• Auth (login, signup, password forgot...)
• Page 404
• ...