Merge TextureAtlas::from_grid_with_padding into TextureAtlas::from_grid through option arguments (#6057)

This is an adoption of #3775
This merges `TextureAtlas` `from_grid_with_padding` into `from_grid` , adding optional padding and optional offset.
Since the orignal PR, the offset had already been added to from_grid_with_padding through #4836 

## Changelog

- Added `padding` and `offset` arguments to  `TextureAtlas::from_grid`
- Removed `TextureAtlas::from_grid_with_padding`

## Migration Guide

`TextureAtlas::from_grid_with_padding` was merged into `from_grid` which takes two additional parameters for padding and an offset.
```
// 0.8
TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1);
// 0.9
TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1, None, None)

// 0.8
TextureAtlas::from_grid_with_padding(texture_handle, Vec2::new(24.0, 24.0), 7, 1, Vec2::new(4.0, 4.0));
// 0.9
TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1, Some(Vec2::new(4.0, 4.0)), None)
```

Co-authored-by: olefish <88390729+oledfish@users.noreply.github.com>

crates/bevy_sprite/src/texture_atlas.rs

@@ -69,29 +69,19 @@ impl TextureAtlas {
 
     /// Generate a `TextureAtlas` by splitting a texture into a grid where each
     /// `tile_size` by `tile_size` grid-cell is one of the textures in the
-    /// atlas. Resulting `TextureAtlas` is indexed left to right, top to bottom.
+    /// atlas. Grid cells are separated by some `padding`, and the grid starts
+    /// at `offset` pixels from the top left corner. Resulting `TextureAtlas` is
+    /// indexed left to right, top to bottom.
     pub fn from_grid(
         texture: Handle<Image>,
         tile_size: Vec2,
         columns: usize,
         rows: usize,
+        padding: Option<Vec2>,
+        offset: Option<Vec2>,
     ) -> TextureAtlas {
-        Self::from_grid_with_padding(texture, tile_size, columns, rows, Vec2::ZERO, Vec2::ZERO)
+        let padding = padding.unwrap_or_default();
-    }
+        let offset = offset.unwrap_or_default();
-
-    /// Generate a `TextureAtlas` by splitting a texture into a grid where each
-    /// `tile_size` by `tile_size` grid-cell is one of the textures in the
-    /// atlas. Grid cells are separated by some `padding`, and the grid starts
-    /// at `offset` pixels from the top left corner. Resulting `TextureAtlas` is
-    /// indexed left to right, top to bottom.
-    pub fn from_grid_with_padding(
-        texture: Handle<Image>,
-        tile_size: Vec2,
-        columns: usize,
-        rows: usize,
-        padding: Vec2,
-        offset: Vec2,
-    ) -> TextureAtlas {
         let mut sprites = Vec::new();
         let mut current_padding = Vec2::ZERO;
 

examples/2d/sprite_sheet.rs

@@ -39,7 +39,8 @@ fn setup(
     mut texture_atlases: ResMut<Assets<TextureAtlas>>,
 ) {
     let texture_handle = asset_server.load("textures/rpg/chars/gabe/gabe-idle-run.png");
-    let texture_atlas = TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1);
+    let texture_atlas =
+        TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1, None, None);
     let texture_atlas_handle = texture_atlases.add(texture_atlas);
     commands.spawn(Camera2dBundle::default());
     commands.spawn((

examples/stress_tests/many_animated_sprites.rs

@@ -46,7 +46,8 @@ fn setup(
     let half_y = (map_size.y / 2.0) as i32;
 
     let texture_handle = assets.load("textures/rpg/chars/gabe/gabe-idle-run.png");
-    let texture_atlas = TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1);
+    let texture_atlas =
+        TextureAtlas::from_grid(texture_handle, Vec2::new(24.0, 24.0), 7, 1, None, None);
     let texture_atlas_handle = texture_atlases.add(texture_atlas);
 
     // Spawns the camera