add lithuanian language

[audriusbuika]

add new language: lithuanian

[idrassi]

The version should be 1.26.27 like other language files

[idrassi]

Delete this file: there should be only one language file inside "Translations" directory

[idrassi]

Thank you for the PR.

There are some issues that must be fixed before this can be merged:

1. Several translated entries are incomplete or change the meaning of the English text.

   Please re-check the whole file against src/Common/Language.xml, especially long warning/help messages. The translation can be natural Lithuanian but it must not omit warnings, final questions, recovery steps, or security explanations.

   Examples:

   • TRAVELER_UAC_NOTE around line 897: the final confirmation question is missing, and the installed-mode UAC behavior is changed.
   • CUSTOM_BOOT_LOADER_MESSAGE_HELP around line 1084: the original warning that an adversary can still detect the VeraCrypt boot loader by analyzing disk contents is replaced by unrelated text about entering the password correctly.
   • SYSENC_HIDDEN_OS_REQ_CHECK_PAGE_HELP around line 1164: most of the decoy OS / three-password explanation is missing.
   • SYS_ENCRYPTION_PRETEST_INFO2_PORTION_3 around line 1186 and RESCUE_DISK_HELP_PORTION_2 around line 1202: recovery instructions are truncated.
   • RESCUE_DISK_HELP_PORTION_8 around line 1208: the final mount/password/OK instructions are missing.
   • DECOY_OS_INSTRUCTIONS_PORTION_4 around line 1213: the final requirement about not creating any partition between the decoy system partition and the hidden system partition is missing.
   • BOOT_PRETEST_FAILED_RETRY around line 1232: the troubleshooting URL paragraph is missing.
   • UPDATE_TC_IN_DECOY_OS_FIRST around line 1253: the final “Do you want to continue?” question is missing.
   • ENABLE_BAD_SECTOR_ZEROING around line 1263: the final question asking whether VeraCrypt should write zeroes to unreadable sectors is missing.
   • BOOT_PASSWORD_CACHE_KEYBOARD_WARNING around line 1286: steps 5 and 6 and the final warning are missing.

2. Some entries still have lang="en" inside the Lithuanian file.

   All entries in Translations/Language.lt.xml should use lang="lt", even if the displayed text intentionally remains English.

   Examples:

   • IDT_PASS around line 90
   • many VKEY_* entries around lines 1316-1362
   • PRE-BOOT around line 1404

   Also, VKEY_AD is not in sync with the current English reference: the Lithuanian file contains Volume Mute, while the current English reference contains Mute.

3. The prog-version is still outdated.

   The file still has:

   <localization prog-version="1.24-Update8">

Please change it to 1.26.27, like the other current translation files.

4. A Linux mnemonic was lost.

   LINUX_MOUNT_SYSTEM_ENC_PREBOOT around line 1482 translates:

   Mount partition &using system encryption...

   but the Lithuanian text has no & mnemonic. Please add an appropriate & accelerator in the Lithuanian text if possible.

5. Please review the translation quality and terminology.

   Some parts look machine-translated or inconsistent. For example:

   • on-the-fly is translated literally as skrendant, which is not appropriate technical Lithuanian in this context.
   • pre-boot terminology is inconsistent: both pirminės paleisties and priešparleisties are used.
   • Lithuanian quotation marks should be checked for consistency. The file currently uses „text” in many places: standard Lithuanian typography uses „text“

Please go through the full file again using the current src/Common/Language.xml as the source of truth, make sure no English meaning is shortened or changed, and fix the metadata/format issues above.