made a simple password visibility toggler

modified:   Cargo.lock
	modified:   Cargo.toml
	modified:   src/pages/signup.rs
	modified:   style/signup.scss

Cargo.toml

@@ -23,7 +23,9 @@ leptos_icons = { version = "0.1.0", default_features = false, features = [
   "BsPauseFill",
   "BsSkipStartFill",
   "BsSkipEndFill",
-  "IoReturnUpBackSharp"
+  "IoReturnUpBackSharp",
+  "AiEyeFilled",
+  "AiEyeInvisibleFilled"
 ] }
 dotenv = { version = "0.15.0", optional = true }
 diesel = { version = "2.1.4", features = ["postgres", "r2d2"], optional = true }