Improve Homebrew output parsing

It likes to output CSI 0 G in particular, expecting that it works
(the coordinates are normally 1-based).

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2024 - 2025, Přemysl Eric Janouch <p@janouch.name>
+Copyright (c) 2024 - 2026, Přemysl Eric Janouch <p@janouch.name>
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted.

terminal.go

@@ -206,17 +206,24 @@ func (tw *terminalWriter) processParsedCSI(
 		}
 		tw.column = 0
 		return true
+	case final == 'G': // Cursor Character Absolute
+		if len(params) == 0 {
+			tw.column = 0
+		} else {
+			tw.column = max(params[0]-1, 0)
+		}
+		return true
 	case final == 'H': // Cursor Position
 		if len(params) == 0 {
 			tw.line = tw.lineTop
 			tw.column = 0
-		} else if len(params) < 2 || params[0] <= 0 || params[1] <= 0 {
+		} else if len(params) < 2 {
 			return false
 		} else if params[0] >= 32766 && params[1] >= 32766 {
 			// Ignore attempts to scan terminal bounds.
 		} else {
-			tw.line = tw.lineTop + params[0] - 1
-			tw.column = params[1] - 1
+			tw.line = tw.lineTop + max(params[0]-1, 0)
+			tw.column = max(params[1]-1, 0)
 		}
 		return true
 	case final == 'J': // Erase in Display