init layout, notifications, tabs & more

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

bubbles/layout.go

@@ -0,0 +1,13 @@
+package bubbles
+
+import "strings"
+
+// SplitH splits totalHeight into top and bottom sections, accounting for the
+// height of statusBar (measured by newline count).
+func SplitH(totalHeight int, statusBar string, ratio float64) (top, bottom int) {
+	statusH := strings.Count(statusBar, "\n") + 1
+	available := totalHeight - statusH
+	top = int(float64(available) * ratio)
+	bottom = available - top
+	return
+}