Change image hash compare algorithm and add multithreading (#762)

* New image compare algorithm

* Par iter

* Ending words

Author: qarmin

Cargo.lock

@@ -25,7 +25,7 @@ hamming = "0.1.3"
 
 # Needed by same music
 bitflags = "1.3.2"
-lofty="0.6.2"
+lofty="0.7.0"
 
 # Futures - needed by async progress sender
 futures = "0.3.21"
@@ -65,6 +65,8 @@ imagepipe = "0.5.0"
 mime_guess = "2.0.4"
 infer = "0.8.0"
 
+num_cpus = "1.13.1"
+
 libheif-rs = { version = "0.15.0", optional = true }
 anyhow = { version = "1.0.57", optional = true }