Adding multilingual in date feature

[cizoop]

Describe the bug
we have official 22 languages in India officially. now its supported for en-us,hi,gu as per libraries ,we can modify the country class (India) to read the new language, and we can extend it to full multilingual holiday calendar generator.Classification of holidays

Expected behavior
Holiday Classification
Dates are classified into:
Official holidays → government-declared public holidays
Unofficial holidays → cultural/regional holidays
Workdays → weekdays that are not holidays
Optional: categories like OPTIONAL, UNOFFICIAL, WORKDAY are correctly applied.
Multilingual Support-Holiday names are shown in multiple languages as per state Users can switch languages or see multiple columns at once. For unsupported holidays, fallback to English.
Optional: visual calendar (using Matplotlib) highlights holidays.