Wiki update

[j3r3m1]

Several updates need to be done in the wiki:

• [x] TSU paragraph: need to contain the urban area type (with size threshold) consideration + sea land mask
• [x] Update scheme processing chain (input sea_land_mask + urban_area)
• [x] Add a page to describe the grid indicator output
• [x] Update scheme indicator grids removing the output indic (just say "output indic") and add a link to the grid_indicator table in the wiki (add the list of all grid indicators possible)
• [x] Update the tutorial page: check all informations but more specifically
  • BDTopo V2 AND V3 now (just update screenshots and sentences)
  • remove the groovy pages since we will share examples of specific scripts in the future
• [x] Update the figure (and bullet points) of the coding implementation page (add BDTopo V3)