Add packaging and release automation

vendor/github.com/charmbracelet/bubbletea/focus.go

@@ -0,0 +1,9 @@
+package tea
+
+// FocusMsg represents a terminal focus message.
+// This occurs when the terminal gains focus.
+type FocusMsg struct{}
+
+// BlurMsg represents a terminal blur message.
+// This occurs when the terminal loses focus.
+type BlurMsg struct{}