Polish Translation

[ryziopl]

Addes Files with translation in ../application/src/translations/pl

• about.ts - 100%
• common.ts - 100%
• docker.ts - 100%
• incident.ts - 100%
• index.ts - 100%
• instance.ts - 70%
• login.ts - TO DO
• maintenance.ts - TO DO
• menu.ts - TO DO
• operation.ts - TO DO
• public.ts - TO DO
• region.ts - TO DO
• services.ts - TO DO
• settings.ts - TO DO
• ssl.ts - TO DO

Modify file in ../application/src/translations/index.tx
Added lines for Polish translation.