feat(tasks/prettier): Show total match ratio with updating snapshot f…

…ormat (#8788)

Previously, #8634 visualized each spec result, but this was not enough.

If the implementation has been updated but the spec still fails, there
is no way to know if there is an improvement or not.

This time, finally, all progress is visualized! 🤩 


![image](https://github.com/user-attachments/assets/df5b4658-450a-4b0c-8348-ffc9b977c50c)

e.g. here `arrow_function_expression` is mostly passing, except for
comment handling.

tasks/common/src/diff.rs

@@ -1,9 +1,10 @@
 use console::Style;
-use similar::{ChangeTag, TextDiff};
-
-pub fn print_diff_in_terminal(expected: &str, actual: &str) {
-    let diff = TextDiff::from_lines(expected, actual);
+use similar::{ChangeTag, DiffableStr, TextDiff};
 
+pub fn print_diff_in_terminal<T>(diff: &TextDiff<T>)
+where
+    T: DiffableStr + ?Sized,
+{
     for op in diff.ops() {
         for change in diff.iter_changes(op) {
             let (sign, style) = match change.tag() {

tasks/prettier_conformance/Cargo.toml

@@ -33,4 +33,5 @@ oxc_tasks_common = { workspace = true }
 cow-utils = { workspace = true }
 pico-args = { workspace = true }
 rustc-hash = { workspace = true }
+similar = { workspace = true }
 walkdir = { workspace = true }