feat: merge lasting_allocator and scratch_allocator

The distinction between the two wasn't necessary and in pratice, both
allocators always ended up being the same.

Author: zenith391

examples/300-buttons.zig

@@ -13,7 +13,7 @@ pub fn main() !void {
     const NUM_BUTTONS = 300;
 
     // This is only used for additional performance
-    var label_arena = std.heap.ArenaAllocator.init(capy.internal.scratch_allocator);
+    var label_arena = std.heap.ArenaAllocator.init(capy.internal.allocator);
     defer label_arena.deinit();
     const label_allocator = label_arena.child_allocator;
 

examples/7gui/counter.zig

@@ -38,7 +38,7 @@ pub fn main() !void {
     // Atom.
     // However, FormatAtom isn't bi-directional (editing the text field won't change count's value),
     // but it remains best fit for this example as the text field is read-only.
-    var format = try capy.FormattedAtom(capy.internal.lasting_allocator, "{d}", .{&count});
+    var format = try capy.FormattedAtom(capy.internal.allocator, "{d}", .{&count});
     defer format.deinit();
 
     try window.set(capy.alignment(

examples/abc.zig

@@ -24,7 +24,7 @@ pub fn main() !void {
     );
 
     var window = try capy.Window.init();
-    const format = try capy.FormattedAtom(capy.internal.lasting_allocator, "{d:.3}", .{displayed_temperature});
+    const format = try capy.FormattedAtom(capy.internal.allocator, "{d:.3}", .{displayed_temperature});
     try window.set(capy.column(.{}, .{
         capy.label(.{})
             .bind("text", format),

examples/balls.zig

@@ -28,7 +28,7 @@ pub fn main() !void {
     defer capy.deinit();
 
     defer totalEnergy.deinit();
-    balls = std.ArrayList(Ball).init(capy.internal.lasting_allocator);
+    balls = std.ArrayList(Ball).init(capy.internal.allocator);
     defer balls.deinit();
 
     // Generate random balls
@@ -54,7 +54,7 @@ pub fn main() !void {
     try canvas.addMouseButtonHandler(&onMouseButton);
     try canvas.addMouseMotionHandler(&onMouseMotion);
 
-    var totalEnergyFormat = try capy.FormattedAtom(capy.internal.lasting_allocator, "Total Kinetic Energy: {d:.2}", .{&totalEnergy});
+    var totalEnergyFormat = try capy.FormattedAtom(capy.internal.allocator, "Total Kinetic Energy: {d:.2}", .{&totalEnergy});
     defer totalEnergyFormat.deinit();
 
     var window = try capy.Window.init();

examples/demo.zig

@@ -28,7 +28,7 @@ pub fn main() !void {
     var somesliderValue = capy.Atom(f32).of(0);
     defer somesliderValue.deinit();
 
-    const somesliderText = try capy.FormattedAtom(capy.internal.lasting_allocator, "{d:.1}", .{&somesliderValue});
+    const somesliderText = try capy.FormattedAtom(capy.internal.allocator, "{d:.1}", .{&somesliderValue});
     defer somesliderText.deinit();
 
     try window.set(capy.row(.{ .spacing = 0 }, .{

examples/dev-tools.zig

@@ -2,7 +2,7 @@ const std = @import("std");
 const capy = @import("capy");
 pub usingnamespace capy.cross_platform;
 
-pub const app_allocator = capy.internal.lasting_allocator;
+pub const app_allocator = capy.internal.allocator;
 var app_window: capy.Window = undefined;
 var dev_protocol_stream: ?std.net.Stream = null;
 

examples/fade.zig

@@ -27,7 +27,7 @@ pub fn main() !void {
     try capy.init();
 
     var window = try capy.Window.init();
-    // const imageData = try capy.ImageData.fromBuffer(capy.internal.lasting_allocator, @embedFile("ziglogo.png"));
+    // const imageData = try capy.ImageData.fromBuffer(capy.internal.allocator, @embedFile("ziglogo.png"));
 
     try window.set(
         capy.row(.{}, .{

examples/hacker-news.zig

@@ -5,7 +5,7 @@ pub usingnamespace capy.cross_platform;
 const ListModel = struct {
     /// size is a data wrapper so that we can change it (e.g. implement infinite scrolling)
     size: capy.Atom(usize) = capy.Atom(usize).of(10),
-    arena: std.heap.ArenaAllocator = std.heap.ArenaAllocator.init(capy.internal.lasting_allocator),
+    arena: std.heap.ArenaAllocator = std.heap.ArenaAllocator.init(capy.internal.allocator),
 
     pub fn getComponent(self: *ListModel, index: usize) *capy.Label {
         return capy.label(.{

examples/many-counters.zig

@@ -11,9 +11,9 @@ const CounterState = struct {
 };
 
 fn counter() anyerror!*capy.Alignment {
-    var state1 = try capy.internal.lasting_allocator.create(CounterState);
+    var state1 = try capy.internal.allocator.create(CounterState);
     state1.* = .{};
-    const format = try capy.FormattedAtom(capy.internal.lasting_allocator, "{d}", .{&state1.count});
+    const format = try capy.FormattedAtom(capy.internal.allocator, "{d}", .{&state1.count});
     // TODO: when to deinit format?
 
     return capy.alignment(

examples/notepad.zig

@@ -22,7 +22,7 @@ pub fn main() !void {
         }
     }.callback);
 
-    var label_text = try capy.FormattedAtom(capy.internal.lasting_allocator, "Text length: {d}", .{text_length});
+    var label_text = try capy.FormattedAtom(capy.internal.allocator, "Text length: {d}", .{text_length});
     defer label_text.deinit();
 
     try window.set(capy.column(.{ .spacing = 0 }, .{