Feat: Added Rust ffi_rs crates & unit test.

[Reim-developer]

Change Log:

commit 2fb96e4 (HEAD -> dev, origin/dev)
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 18:34:48 2025 +0700

feat:
+ Added `free_c_str` for check is valid path
+ Addded test case for this function

commit 3bf446f
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 18:34:32 2025 +0700

feat:
+ Added `free_c_str` for free `c_char`
+ Addded test case for this function

commit 47fcd01
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 18:33:55 2025 +0700

Added `mod` list & linter

commit 5382cd2
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 18:33:42 2025 +0700

Added `Bash` script for test FFI Rust -> C++

commit 0eb3f9f
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 18:33:24 2025 +0700

Added test case with `fn` `is_valid_path` from Rust

commit 4a41584
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 18:33:03 2025 +0700

Added `Cargo.lock` & `Cargo.toml` to `ffi_rs` crates.

commit 6f28482
Author: Reim-developer contact.kaxtr@gmail.com
Date: Mon Jul 28 03:28:01 2025 +0700

Added Bash script helper for test FFI Rust -> C++