[orx-text-writer] Add horizontal and vertical text alignment features

Introduced horizontalAlign and verticalAlign properties in WriteStyle and TextWriter, enabling precise text alignment within bounding boxes. Enhanced text token management to support alignment calculations and adjusted demos to showcase the new capabilities.

orx-text-writer/src/jvmDemo/kotlin/DemoTextWriter03.kt

@@ -0,0 +1,35 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.isolated
+import org.openrndr.draw.loadFont
+import org.openrndr.extra.shapes.primitives.grid
+import org.openrndr.extra.textwriter.writer
+
+fun main() {
+    application {
+        configure {
+            width = 720
+            height = 720
+        }
+        program {
+            extend {
+                val columns = drawer.bounds.grid(3, 3).flatten()
+                drawer.fontMap = loadFont("demo-data/fonts/IBMPlexMono-Regular.ttf", 16.0)
+                for ((index, column) in columns.withIndex()) {
+                    drawer.isolated {
+                        drawer.stroke = ColorRGBa.WHITE
+                        drawer.fill = null
+                        drawer.rectangle(column.offsetEdges(-10.0))
+                    }
+
+                    writer {
+                        style.verticalAlign = (index/3) / 2.0
+                        style.horizontalAlign = index.mod(3) / 2.0
+                        box = column.offsetEdges(-20.0)
+                        text(listOf("DEAR FRIENDS.","IT TOOK A WHILE, BUT NOW WE HAVE TEXT ALIGNMENT IN BOTH DIRECTIONS!", "LET'S CELEBRATE"))
+                    }
+                }
+            }
+        }
+    }
+}