feat(mouse): add extended coordinates and additional buttons support

The X10 mouse protocol limits the X and Y coordinates to 223 cells only.
SGR (1006) fixes that.

* Support additional buttons like wheel left/right and backward/forward
* SGR (1006) mode extended coordinates.

feat(mouse): deprecated MouseEventType and support additional button

This includes wheel left/right, and buttons 8 through 11

chore(mouse): add extended sgr mode tests

chore(mouse): update mouse example

feat(mouse): enable extended mode by default

ref(mouse): rename backward button to back button

fix(mouse): set mouse type to release on SGR

ref(mouse): remove extended pixels mode

fix(mouse): mouse tests

examples/mouse/main.go

@@ -4,21 +4,19 @@ package main
 // coordinates and events.
 
 import (
-	"fmt"
 	"log"
 
 	tea "github.com/charmbracelet/bubbletea"
 )
 
 func main() {
-	p := tea.NewProgram(model{}, tea.WithAltScreen(), tea.WithMouseAllMotion())
+	p := tea.NewProgram(model{}, tea.WithMouseAllMotion())
 	if _, err := p.Run(); err != nil {
 		log.Fatal(err)
 	}
 }
 
 type model struct {
-	init       bool
 	mouseEvent tea.MouseEvent
 }
 
@@ -34,20 +32,14 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 
 	case tea.MouseMsg:
-		m.init = true
-		m.mouseEvent = tea.MouseEvent(msg)
+		return m, tea.Printf("(X: %d, Y: %d) %s", msg.X, msg.Y, tea.MouseEvent(msg))
 	}
 
 	return m, nil
 }
 
 func (m model) View() string {
-	s := "Do mouse stuff. When you're done press q to quit.\n\n"
-
-	if m.init {
-		e := m.mouseEvent
-		s += fmt.Sprintf("(X: %d, Y: %d) %s", e.X, e.Y, e)
-	}
+	s := "Do mouse stuff. When you're done press q to quit.\n"
 
 	return s
 }

key.go

@@ -581,7 +581,7 @@ func readInputs(input io.Reader) ([]Msg, error) {
 
 	// Check if it's a mouse event. For now we're parsing X10-type mouse events
 	// only.
-	mouseEvent, err := parseX10MouseEvents(b)
+	mouseEvent, err := parseMouseEvents(b)
 	if err == nil {
 		var m []Msg
 		for _, v := range mouseEvent {