RUST: Split the rust part of lektor into multiple modules

CMakeLists.txt

README.md

lektor.code-workspace

src/rust/liblektor-rs/Cargo.toml

src/rust/liblektor-rs/dependencies.png

src/rust/liblektor-rs/kurisu_api/Cargo.toml

src/rust/liblektor-rs/kurisu_api/src/lib.rs

src/rust/liblektor-rs/kurisu_api/src/v1.rs

src/rust/liblektor-rs/lektor_c_compat/Cargo.toml

src/rust/liblektor-rs/lektor_c_compat/src/c_types.rs

src/rust/liblektor-rs/lektor_c_compat/src/lib.rs

src/rust/liblektor-rs/lektor_db/Cargo.toml

src/rust/liblektor-rs/lektor_db/build.rs

src/rust/liblektor-rs/lektor_db/diesel.toml

...s/lektor_db/migrations/2022-09-30-204512_initial/down.sql

...-rs/lektor_db/migrations/2022-09-30-204512_initial/up.sql

src/rust/liblektor-rs/lektor_db/src/connexion.rs

src/rust/liblektor-rs/lektor_db/src/database/schema.rs

src/rust/liblektor-rs/lektor_db/src/error.rs

src/rust/liblektor-rs/lektor_db/src/lib.rs