Add documentation about Figma -- very first draft

docs/design.md

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+# Element Android design
+
+## Introduction
+
+Design at element.io is done using Figma - https://www.figma.com
+
+## How to import from Figma to the Element Android project
+
+Integration should be done using the Android development best practice, and should follow the existing convention in the code.
+
+### Colors
+
+Element Android already contains all the colors which can be used by the designer, in the module `ui-style`.
+Some of them depend on the theme, so ensure to use theme attributes and not colors directly.
+
+### Text
+
+ - click on a text on Figma
+ - on the right panel, information about the style and colors are displayed
+ - in Element Android, text style are already defined, generally you should not create new style
+ - apply the style and the color to the layout
+
+### Dimension, position and margin
+
+ - click on an item on Figma
+ - dimensions of the item will be displayed.
+ - move the mouse to other items to get relative positioning, margin, etc.
+
+### Icons
+
+#### Export drawable from Figma
+
+ - click on the element to export
+ - ensure that the correct layer is selected. Sometimes the parent layer has to be selected on the left panel
+ - on the right panel, click on "export"
+ - select SVG
+ - you cqn check the preview of what will be exported
+ - click on "export" and save the file locally
+ - unzip the file if necessary
+
+It's also possible for any icon to go to the main component by right-clicking on the icon.
+
+#### Import in Android Studio
+
+ - right click on the drawable folder where the drawable will be created
+ - click on "New"/"Vector Asset"
+ - select the exported file
+ - update the filename if necessary
+ - click on "Next" and click on "Finish"
+ - open the created vector drawable
+ - optionally update the color(s) to "#FF0000" (red) to ensure that the drawable is correctly tinted at runtime.
+
+## Figma links
+
+Figma links can be included in the layout, for future reference, but it is also OK to add a paragraph below here, to centralize the information
+
+Main entry point: https://www.figma.com/files/project/5612863/Element?fuid=779371459522484071
+
+Note: all the Figma links are not publicly available.
+
+### Coumpound
+
+Coumpound contains the theme of the application, with all the components, in Light and Dark theme: palette (colors), typography, iconography, etc.
+
+https://www.figma.com/file/X4XTH9iS2KGJ2wFKDqkyed/Compound
+
+### Login
+
+TBD
+
+#### Login v2
+
+https://www.figma.com/file/xdV4PuI3DlzA1EiBvbrggz/Login-Flow-v2
+
+### Room list
+
+TBD
+
+### Timeline
+
+https://www.figma.com/file/x1HYYLYMmbYnhfoz2c2nGD/%5BRiotX%5D-Misc?node-id=0%3A1
+
+### Voice message
+
+https://www.figma.com/file/uaWc62Ux2DkZC4OGtAGcNc/Voice-Messages?node-id=473%3A12
+
+### Room settings
+
+TBD
+
+### VoIP
+
+https://www.figma.com/file/V6m2z0oAtUV1l8MdyIrAep/VoIP?node-id=4254%3A25767
+
+### Presence
+
+https://www.figma.com/file/qmvEskET5JWva8jZJ4jX8o/Presence---User-Status?node-id=114%3A9174
+(Option B is chosen)
+
+### Spaces
+
+https://www.figma.com/file/m7L63aGPW7iHnIYStfdxCe/Spaces?node-id=192%3A30161
+
+### List to be continued...