feat: add option to set title color to info name color (#15)

This can be done by setting `PF_COL3` to `COL1`

README.md

@@ -120,7 +120,7 @@ PF_COL2=9
 
 # Color of title data:
 # Default: unset (auto)
-# Valid: 0-9
+# Valid: 0-9, COL1 (copies COL1 value)
 PF_COL3=1
 
 # Alignment paddings (this is different to the original version).

src/main.rs

@@ -261,7 +261,9 @@ fn main() {
     }
 
     if let Ok(newcolor) = dotenvy::var("PF_COL3") {
-        if let Ok(newcolor) = pfetch::Color::from_str(&newcolor) {
+        if newcolor == "COL1" {
+            logo.secondary_color = logo.primary_color;
+        } else if let Ok(newcolor) = pfetch::Color::from_str(&newcolor) {
             logo.secondary_color = newcolor;
         }
     }