feat: Add basic counter application

This commit introduces a simple counter application using Bubble Tea. It
includes the necessary Go module files and the main application logic
for incrementing, decrementing, and quitting the application.

main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+type model struct {
+	counter int
+}
+
+func initialModel() model {
+	return model{counter: 0}
+}
+
+func (m model) Init() tea.Cmd {
+	return nil
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "q", "ctrl+c":
+			return m, tea.Quit
+		case "+":
+			m.counter++
+		case "-":
+			m.counter--
+		}
+	}
+	return m, nil
+}
+
+func (m model) View() string {
+	return fmt.Sprintf(
+		"Counter: %d\n\nPress + / - to change\nPress q to quit\n",
+		m.counter,
+	)
+}
+
+func main() {
+	p := tea.NewProgram(initialModel())
+	if err := p.Start(); err != nil {
+		fmt.Println("Error:", err)
+		os.Exit(1)
+	}
+}
+