RUST: Update & fix some warnings given by rust

src/Rust/Cargo.lock

src/Rust/vvs_font/src/error.rs

src/Rust/vvs_font/src/font.rs

src/Rust/vvs_lang/src/error_report.rs

src/Rust/vvs_lang/src/symbol_table.rs

src/Rust/vvs_lib/src/lib.rs

src/Rust/vvs_llvm/src/bindings/builder.rs

src/Rust/vvs_llvm/src/bindings/jit.rs

src/Rust/vvs_parser/src/ast/options.rs

src/Rust/vvs_parser/src/node.rs

src/Rust/vvs_runtime_types/src/mangle.rs

src/Rust/vvs_runtime_types/src/vvll.rs

src/Rust/vvs_xdg/src/config.rs

src/Rust/vvs_xdg/src/paths.rs