[feat] gva: create query balance

Cargo.lock

Cargo.toml

rust-libs/duniter-dbs-write-ops/src/bc.rs

rust-libs/duniter-dbs-write-ops/src/bc/identities.rs

rust-libs/duniter-dbs-write-ops/src/bc/uds.rs

rust-libs/duniter-dbs-write-ops/src/gva.rs

rust-libs/duniter-dbs-write-ops/src/gva/identities.rs

rust-libs/duniter-dbs-write-ops/src/gva/tx.rs

rust-libs/duniter-dbs/src/bc_v2.rs

rust-libs/duniter-dbs/src/gva_v1.rs

rust-libs/duniter-dbs/src/lib.rs

rust-libs/duniter-dbs/src/values.rs

rust-libs/duniter-dbs/src/values/block_meta.rs

rust-libs/duniter-dbs/src/values/gva_idty_db.rs

rust-libs/duniter-dbs/src/values/idty_db.rs

rust-libs/duniter-dbs/src/values/source_amount.rs

rust-libs/modules/duniter-gva/src/entities.rs

rust-libs/modules/duniter-gva/src/lib.rs

rust-libs/modules/duniter-gva/src/queries.rs

rust-libs/modules/duniter-gva/src/queries/account_balance.rs