Make the paging function accept a Reader

This should cover all use cases with just one method.

m/embed-api.go

@@ -0,0 +1,24 @@
+package m
+
+import "github.com/gdamore/tcell/v2"
+
+// Page displays text in a pager.
+//
+// The reader parameter can be constructed using one of:
+// * NewReaderFromFilename()
+// * NewReaderFromText()
+// * NewReaderFromStream()
+//
+// Or your could roll your own Reader based on the source code for any of those
+// constructors.
+func Page(reader *Reader) error {
+	screen, e := tcell.NewScreen()
+	if e != nil {
+		// Screen setup failed
+		return e
+	}
+	defer screen.Fini()
+
+	NewPager(reader).StartPaging(screen)
+	return nil
+}

m/util.go

@@ -1,22 +0,0 @@
-package m
-
-import "github.com/gdamore/tcell/v2"
-
-// PageString displays a multi-line text in a pager.
-//
-// name - Will be displayed in the bottom left corner of the pager window
-//
-// text - This is the (potentially long) multi line text that will be displayed
-func PageString(name string, text string) error {
-	reader := NewReaderFromText(name, text)
-
-	screen, e := tcell.NewScreen()
-	if e != nil {
-		// Screen setup failed
-		return e
-	}
-	defer screen.Fini()
-
-	NewPager(reader).StartPaging(screen)
-	return nil
-}