[ref] gva: move read ops specific to gva in gva folder

Cargo.lock

Cargo.toml

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

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

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

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

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

rust-libs/duniter-server/Cargo.toml

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

rust-libs/modules/gva/Cargo.toml

rust-libs/modules/gva/dbs-reader/Cargo.toml

rust-libs/modules/gva/dbs-reader/src/find_inputs.rs

rust-libs/modules/gva/dbs-reader/src/lib.rs

rust-libs/modules/gva/dbs-reader/src/pagination.rs

rust-libs/modules/gva/dbs-reader/src/txs_history.rs

rust-libs/modules/gva/dbs-reader/src/uds_of_pubkey.rs

rust-libs/modules/gva/dbs-reader/src/utxos.rs

rust-libs/modules/gva/src/anti_spam.rs

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

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