✨ Add per-server SMB encryption option

[Victor-root]

What changed ✨

This adds a new per-server SMB encryption option for SMB connections.

By default, nothing changes:

• existing SMB servers keep the current behavior
• new SMB servers use the current non-encrypted SMBJ configuration unless the option is enabled

When enabled, the app uses SMBJ with SmbConfig.builder().withEncryptData(true).build(), which allows connecting to SMB3 servers or shares that require encryption.

Why 🔐

This is related to:

• [Feature Request] Support SMB server signing & server smb encrypt #486
• Feat: enable encryption support for SMB #1271

#1271 already proposed enabling SMB encryption support globally, but this PR takes a more conservative approach: SMB encryption is now controlled per server instead of being enabled for every SMB connection.

This should help with servers such as:

• Samba shares with mandatory SMB encryption
• Windows shares requiring SMB encryption
• NAS devices enforcing encrypted SMB3 sessions

Testing ✅

I tested this myself in real conditions on Android with a server requiring SMB encryption.

I also verified that the option is saved per server and that the default behavior remains unchanged when the option is disabled.

Translations 🌍

I added translations for all currently available app languages.