editor: Represent scroll offset with more precision (#39367)

Closes #5355

Release Notes:

- Fixed rendering glitches with files with more than 16 million lines
(that occured due to floating number rounding errors).

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/assistant_tools/src/edit_file_tool.rs

@@ -17,7 +17,7 @@ use editor::{
 use futures::StreamExt;
 use gpui::{
     Animation, AnimationExt, AnyWindowHandle, App, AppContext, AsyncApp, Entity, Task,
-    TextStyleRefinement, WeakEntity, pulsating_between, px,
+    TextStyleRefinement, WeakEntity, pulsating_between,
 };
 use indoc::formatdoc;
 use language::{
@@ -1102,7 +1102,7 @@ impl ToolCard for EditFileToolCard {
                     .relative()
                     .h_full()
                     .when(!self.full_height_expanded, |editor_container| {
-                        editor_container.max_h(px(COLLAPSED_LINES as f32 * editor_line_height.0))
+                        editor_container.max_h(COLLAPSED_LINES as f32 * editor_line_height)
                     })
                     .overflow_hidden()
                     .border_t_1()