global i18n : add plantlife_i18n mod

idea taken from homedecor_modpack and its homedecor_i18n
all translated mods have a new dependency : plantlife_i18n
translations are stored in po/pot file : one file for all mods

added french translation (almost complete)
transfered de/es/tr/pt translations to corresponding .po file
(only for some mods, unfortunately translations are incomplete)

Translation to Brazilian Portuguese

Translation to Brazilian Portuguese

(due to changes in how visual_scale is interpreted in the engine)

The first one happens because `remove_node` is called
directly, calling `remove_node` for the vine below,
calling `remove_node` for the vine below, calling...

The second one happens because `get_item_group`
returns 0 for groups not set, and 0 is a truthy
value in Lua, so the code always removes the bottom
node regardless of its group rating. This interacted
funnily with doors wanting to remove their top node,
while vines wanted to remove their bottom nodes.

Fix to prevent crashes

Add support of raspberries and blueberries from farming redo

Fix some indented lines from spaces to tabs

It doesn't work well because of the special on_place.

Minetest Game has waterlily now, so we need to load after it to override
its node definition.

Conflicts:
	nature_classic/init.lua