Update translations to MT v5 format

using the script https://github.com/minetest-tools/update_translations

3d_armor_sfinv/locale/template.txt

@@ -0,0 +1,7 @@
+# textdomain: 3d_armor_sfinv
+
+
+### init.lua ###
+
+3d_armor_sfinv: Mod loaded but unused.=
+Armor=