Add validation for Armenia TIN

[unho]

• It is called ՀՎՀՀ which is short for Հարկ վճարողի հաշվառման համարը
• According to https://www.petekamutner.am/Content.aspx?itn=tsTPRTaxPayersRegistration

  The taxpayer identification number (TIN) is composed from eight digits and is not subject to change.

• https://tin-check.com/en/armenia/

  The TIN consists of 8 digits. (NNNNNNNN)

• https://www.google.com/search?q=site%3A.am+tin+number

Search online:

• https://www.petekamutner.am/tsOS_Taxpayers.aspx

Examples:

• https://www.cba.am/am/SitePages/fscfobanks.aspx

  02520007 02502212 00005409 02500518 02566492 02574955 01533411 01505323 02514855 00001182 02518512 00000291 01500362 02201405 02501718 02559077 00400222

• 01538354 from http://www.competition.am/index.php?menu=338&lng=2
• 02502212 from https://www.ameriabank.am/UsefulInformation.aspx?lang=28
• 05541285 from https://www.azdarar.am/announcments/org/80/00418592/
• https://www.google.com/search?q=%D5%80%D5%8E%D5%80%D5%80