Add ability to configure branch color patterns

docs/Config.md

@@ -814,6 +814,7 @@ You can customize the color of branches based on the branch prefix:
 gui:
   branchColors:
     'docs': '#11aaff' # use a light blue for branches beginning with 'docs/'
+    'ISSUE-*': '#ff5733' # use a bright orange for branches beginning with 'ISSUE-'
 ```
 
 ## Example Coloring

pkg/gui/presentation/branches.go

@@ -123,6 +123,19 @@ func getBranchDisplayStrings(
 	return res
 }
 
+func matchColorPrefix(name string) (style.TextStyle, bool) {
+	for possiblePattern, color := range branchPrefixColorCache {
+		if strings.Contains(possiblePattern, "*") {
+			prefix := strings.TrimSuffix(possiblePattern, "*")
+			if strings.HasPrefix(name, prefix) {
+				return color, true
+			}
+		}
+	}
+
+	return style.TextStyle{}, false
+}
+
 // GetBranchTextStyle branch color
 func GetBranchTextStyle(name string) style.TextStyle {
 	branchType := strings.Split(name, "/")[0]
@@ -131,6 +144,10 @@ func GetBranchTextStyle(name string) style.TextStyle {
 		return value
 	}
 
+	if value, ok := matchColorPrefix(name); ok {
+		return value
+	}
+
 	switch branchType {
 	case "feature":
 		return style.FgGreen