gpui: Add a standard text example (#30747)

This is a dumb first pass at a standard text example. We'll use this to
start digging in to some text/scale rendering issues.

There will be a ton of follow-up features to this, but starting simple.

Release Notes:

- N/A

crates/gpui/Cargo.toml

@@ -257,6 +257,10 @@ path = "examples/image/image.rs"
 name = "input"
 path = "examples/input.rs"
 
+[[example]]
+name = "on_window_close_quit"
+path = "examples/on_window_close_quit.rs"
+
 [[example]]
 name = "opacity"
 path = "examples/opacity.rs"
@@ -277,6 +281,10 @@ path = "examples/shadow.rs"
 name = "svg"
 path = "examples/svg/svg.rs"
 
+[[example]]
+name = "text"
+path = "examples/text.rs"
+
 [[example]]
 name = "text_wrapper"
 path = "examples/text_wrapper.rs"
@@ -288,7 +296,3 @@ path = "examples/uniform_list.rs"
 [[example]]
 name = "window_shadow"
 path = "examples/window_shadow.rs"
-
-[[example]]
-name = "on_window_close_quit"
-path = "examples/on_window_close_quit.rs"