move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 62 deletions

diff --git a/rust-src/README.md b/rust-src/README.md
deleted file mode 100644
index e4700f6b..00000000
--- a/rust-src/README.md
+++ /dev/null
@@ -1,62 +0,0 @@
-Usage
-=====
-
-```
-bcachefs-mount 0.1.0
-Mount a bcachefs filesystem by its UUID
-
-USAGE:
-    bcachefs-mount [OPTIONS] <uuid> <mountpoint>
-
-FLAGS:
-    -h, --help       
-            Prints help information
-
-    -V, --version    
-            Prints version information
-
-
-OPTIONS:
-    -o <options>                 
-            Mount options [default: ]
-
-    -p, --password <password>    
-            Where the password would be loaded from.
-            
-            Possible values are: "fail" - don't ask for password, fail if filesystem is encrypted; "wait" - wait for
-            password to become available before mounting; "ask" -  prompt the user for password; [default: fail]
-
-ARGS:
-    <uuid>          
-            External UUID of the bcachefs filesystem
-
-    <mountpoint>    
-            Where the filesystem should be mounted
-```
-
-Caveats
-=======
-
-* `--password ask` is not yet implemented, but you can use `--password wait`, and load the key with `bcachefs unlock`.
-
-Build
-=====
-
-```sh
-$ git submodule update --init --recursive
-$ cargo build --release
-```
-
-Binary will be built in `target/release/bcachefs-mount`
-
-Dependencies:
-
-* rust
-* blkid
-* uuid
-* liburcu
-* libsodium
-* zlib
-* liblz4
-* libzstd
-* libkeyutils