term: add a separate term.set_tab_title/1 API for controling the current tab title in emulators like Konsole, that support many tabs

vlib/term/term_nix.c.v

@@ -80,10 +80,22 @@ pub fn get_cursor_position() !Coord {
 	return Coord{x, y}
 }
 
-// set_terminal_title change the terminal title
+// set_terminal_title change the terminal title (usually that is the containing terminal window title)
 pub fn set_terminal_title(title string) bool {
 	if os.is_atty(1) <= 0 || os.getenv('TERM') == 'dumb' {
-		return true
+		return false
+	}
+	print('\033]0;')
+	print(title)
+	print('\007')
+	flush_stdout()
+	return true
+}
+
+// set_tab_title changes the terminal *tab title*, for terminal emulators like Konsole, that support several tabs
+pub fn set_tab_title(title string) bool {
+	if os.is_atty(1) <= 0 || os.getenv('TERM') == 'dumb' {
+		return false
 	}
 	print('\033]30;')
 	print(title)
@@ -93,8 +105,12 @@ pub fn set_terminal_title(title string) bool {
 }
 
 // clear clears current terminal screen.
-pub fn clear() {
+pub fn clear() bool {
+	if os.is_atty(1) <= 0 || os.getenv('TERM') == 'dumb' {
+		return false
+	}
 	print('\x1b[2J')
 	print('\x1b[H')
 	flush_stdout()
+	return true
 }

vlib/term/term_test.v

@@ -97,8 +97,19 @@ fn test_set_terminal_title() {
 	if os.getenv('CI') != 'true' {
 		return
 	}
-	title_change := term.set_terminal_title('v is awesome!')
-	assert title_change == true
+	term.set_terminal_title('v is awesome!')
+	dump(@FILE)
+	assert true
+}
+
+fn test_set_tab_title() {
+	// do not change the current terminal tab title outside of CI:
+	if os.getenv('CI') != 'true' {
+		return
+	}
+	term.set_tab_title('v is awesome!')
+	dump(@FILE)
+	assert true
 }
 
 fn test_strip_ansi() {