move India country-specific settings to file "_IN.yml"

[asolntsev]

these are valid in all languages, not only in English.

NB! Rename "IND" to "IN" because this is the valid 2-letter India country code.

@sann3 FYI

[what-the-diff]

PR Summary

• Clarifying Language in the README
  The README file was updated to provide more precise information on the language support. "en-IND" was changed to "en-IN (India)" to be more descriptive.

• Added Indian Localization Support
  A new YAML file (_IN.yml) was added specifically for the Indian users. This file includes localized data such as proper address formats used in India and their respective timezones, typical Indian internet practices like widely-used email providers and domain suffixes, and phone number formats that are specific to India.

• Renaming and Updating Previous YAML File
  The existing file en-IND.yml was renamed to en-IN.yml. This file was also updated where redundant fields (like 'address postcode' and 'timezone') were removed. These data are now available in the newly created _IN.yml, optimizing data management and improving overall functionality.

Per tests something was missed as part of this update

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.34%. Comparing base (6df5626) to head (02864e2).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1379      +/-   ##
============================================
- Coverage     92.44%   92.34%   -0.10%     
+ Complexity     3149     3147       -2     
============================================
  Files           319      319              
  Lines          6178     6178              
  Branches        604      604              
============================================
- Hits           5711     5705       -6     
- Misses          324      328       +4     
- Partials        143      145       +2     

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[kingthorin]

Thanks!