Integrate VSS rust client bindings for backups

[ovitrif]

This PR replaces the old custom backup client written in Kotlin by integrating with the rust ffi bindings for the vss-rust-client exposed thru vss-rust-client-ffi.

Description

• Replace old backup client with new client integrating the rust bindings
• Improve logs for backup and restore
• fix: prevent entering a transfer amount higher than max limit
• fix: typo in readme
• Update ldk-node and use new bolt11 payment prop for activity

Note Restore of old user data won't work, not because of incompatibilities, but because I changed the backup category keys passed to VSS, from lowercase to UPPERCASE. This shouldn't be an issue, ldk-node (thus node and wallet state) backups still work.

Preview

n/a - no major UI changes

QA Notes

Tests

1. Restore existing wallet with previous backup data
2. New wallet > change settings and widgets > wipe > restore
3. Transfer: try to enter an amount above max limit
4. Activity Explore: verify bolt11 for sent and received LN payments

[github-advanced-security]

detekt found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

[jvsena42]

Tested

• Create fresh wallet
• transfer
• cjit
• send lightning
• send onCHain
• restore