merge files "et.yml" and "ee.yml"

[asolntsev]

1. "et" is language code, and
2. "ee" is country code

So the proper file name is "et.yml" (and optionally "et_EE.yml", "et_.yml" if needed to customize estonian language in other countries)

[what-the-diff]

PR Summary

• Added Estonian Locale Support
  The README file has been updated to reflect the support of the new Estonian language locale.

• Expanded Address Information in 'et.yml'
  More city names, street suffixes, and states are now available. Additional address related fields like city, street_name, and street_address have also been included. State abbreviations have also been updated for more diverse options.

• Enriched Company Name Formats
  The company.name list in et.yml now comprises a wider variety of company name formats.

• Enhanced Internet Data
  The internet.free_email list and internet.domain_suffix list in et.yml now have more options, offering more diverse choices for email providers and domain suffixes.

• Extended Text Data
  The lorem.words list in et.yml has been expanded to include a wider pool of words.

• Augmented Name Options
  The name lists in et.yml have been updated to include more options for female_first_name, male_first_name and last_name. Furthermore, the name_with_middle list now supports additional variations.

• Updated Phone Number Formats
  Both the phone_number.formats and cell_phone.formats lists have been updated in the et.yml file to include more phone number and cell phone number formats. An additional formats_international section has been added for international phone number formats.

• Introduced Invoice Section
  A new invoice section with a reference subsection has been added to provide patterns for invoice reference numbers.

[snuyanzin]

@asolntsev thanks for driving this
it seems PhoneNumberTest.phoneNumberInternational_estonia should be adopted since it is failing now

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.13%. Comparing base (b37c566) to head (ad89983).
⚠️ Report is 822 commits behind head on main.
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Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1206      +/-   ##
============================================
- Coverage     92.35%   92.13%   -0.22%     
- Complexity     2821     2904      +83     
============================================
  Files           292      301       +9     
  Lines          5609     5745     +136     
  Branches        599      620      +21     
============================================
+ Hits           5180     5293     +113     
- Misses          275      293      +18     
- Partials        154      159       +5     

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[asolntsev]

@snuyanzin Oops, my bad. Fixed PhoneNumberTest.