make doc more readable

Author: vvmruder

docs/src/structure.md

@@ -1,5 +1,7 @@
 QGIS-Server-Light is made of three subparts.
 
-- **exporter** => export necesary data from a qgis project to a simple json (has deps to pyqgis)
-- **interface** => defines all entities shipped around and may be used in 3rd party software (no deps to pyqgis)
-- **worker** => the actual rendering system which you can spawn
+| name          | description                                                               | depends on pyqgis |
+|---------------|---------------------------------------------------------------------------|-------------------|
+| **exporter** | export necesary data from a qgis project to a simple json                 | ✅|
+| **interface**     | defines all entities shipped around and may be used in 3rd party software |❌|
+| **worker**      | the actual rendering system which you can spawn                           |✅|