split mount into a library crate for rust reuse

update makefile to output shared library and rust build
fix default.nix to properly get the binary name for `ln`ing - move binary to main.rs
add rustfmt and gitignore files
move build.rs file into bch_bindgen for reuse between projects
add outputs to nix flake and checks
add mount.toml to makefile

1 files changed, 484 insertions, 0 deletions

diff --git a/rust-src/bch_bindgen/Cargo.lock b/rust-src/bch_bindgen/Cargo.lock
new file mode 100644
index 00000000..2138d338
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