[ADD] l10n_lt: Lithuania's COA

Chart of Accounts (COA) Template for Lithuania's Accounting (VAS-15).

Data is multi language (English and Lithuania).

This module also includes:

* List of available banks in Lithuania.
* Tax groups (to map different tax amounts).
* Most common Lithuanian Taxes.
* Fiscal positions for different countries/groups.
* Account Tags used for reporting purposes.

closes odoo/odoo#39181

X-original-commit: 888245f1a4307bd626cb5f55a3dff09898254790
Signed-off-by: Josse Colpaert <jco@openerp.com>