Use fuzzy-matching to locate symbols when resolving edit steps (#15447)

Release Notes:

- N/A

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Co-authored-by: Nathan <nathan@zed.dev>

crates/assistant/Cargo.toml

@@ -64,6 +64,7 @@ serde_json.workspace = true
 settings.workspace = true
 similar.workspace = true
 smol.workspace = true
+strsim.workspace = true
 telemetry_events.workspace = true
 terminal.workspace = true
 terminal_view.workspace = true