Add rayon for parallel file scanning in for no indexingscan.rs

- Integrated `rayon` for concurrent iteration in `scan_filesystem`, enhancing performance.
- Updated `Cargo.toml` and `Cargo.lock` to include `rayon` and its dependencies.
- Adjusted `scan.rs` to utilize `rayon`'s `par_bridge` for parallel file processing with error handling.

Cargo.lock

@@ -246,6 +246,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "either"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+
 [[package]]
 name = "encode_unicode"
 version = "1.0.0"
@@ -459,6 +465,7 @@ dependencies = [
  "ignore",
  "num_cpus",
  "once_cell",
+ "rayon",
  "rusqlite",
  "serde",
  "toml",
@@ -536,6 +543,26 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rayon"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.5.0"