Fix clippy::redundant_clone lint violations (#36558)

This removes around 900 unnecessary clones, ranging from cloning a few
ints all the way to large data structures and images.

A lot of these were fixed using `cargo clippy --fix --workspace
--all-targets`, however it often breaks other lints and needs to be run
again. This was then followed up with some manual fixing.

I understand this is a large diff, but all the changes are pretty
trivial. Rust is doing some heavy lifting here for us. Once I get it up
to speed with main, I'd appreciate this getting merged rather sooner
than later.

Release Notes:

- N/A

crates/markdown_preview/src/markdown_parser.rs

@@ -178,7 +178,6 @@ impl<'a> MarkdownParser<'a> {
                 _ => None,
             },
             Event::Rule => {
-                let source_range = source_range.clone();
                 self.cursor += 1;
                 Some(vec![ParsedMarkdownElement::HorizontalRule(source_range)])
             }
@@ -401,7 +400,7 @@ impl<'a> MarkdownParser<'a> {
         }
         if !text.is_empty() {
             markdown_text_like.push(MarkdownParagraphChunk::Text(ParsedMarkdownText {
-                source_range: source_range.clone(),
+                source_range,
                 contents: text,
                 highlights,
                 regions,
@@ -420,7 +419,7 @@ impl<'a> MarkdownParser<'a> {
         self.cursor += 1;
 
         ParsedMarkdownHeading {
-            source_range: source_range.clone(),
+            source_range,
             level: match level {
                 pulldown_cmark::HeadingLevel::H1 => HeadingLevel::H1,
                 pulldown_cmark::HeadingLevel::H2 => HeadingLevel::H2,

crates/markdown_preview/src/markdown_preview_view.rs

@@ -115,8 +115,7 @@ impl MarkdownPreviewView {
                         pane.activate_item(existing_follow_view_idx, true, true, window, cx);
                     });
                 } else {
-                    let view =
-                        Self::create_following_markdown_view(workspace, editor.clone(), window, cx);
+                    let view = Self::create_following_markdown_view(workspace, editor, window, cx);
                     workspace.active_pane().update(cx, |pane, cx| {
                         pane.add_item(Box::new(view.clone()), true, true, None, window, cx)
                     });