Languages with no sources - Loc supplying

[IohannesIohannium]

(Same premise as #70)

Loc supplying would be in a configurable rosetta.csv and would be of this format:

EU4 tag;braz_por;braz_por_adj;japanese;korean;polish;polish_adj;russian;russian_adj;simp_chinese;turkish
FRA;França;francesa;フランス;프랑스;Francja;francusk;Франция;французск;法国;Fransa

The converter would use this file as a source for all fields that are not empty. Some columns are redundant. Namely, Japanese, Korean, Chinese and Turkish have the same localized string for both name and adjective.

[IohannesIohannium]

The converter should also be able to equally parse the [mod folder]/eu4tovic3/export_rosetta.csv file that may exist in a EU4 mod used in game.

[IohannesIohannium]

Initial rosetta.csv, created by mixing loc mods (support tag names in Japanese, Polish, Russian and Chinese)

[Zemurin]

While I'm leaving this issue open, I personally do not intend to work on this issue. Any contributor is welcome to implement this.