jj resolve --list: make output aligned

If all file names are short enough, this will align the conflict
description at 4 spaces past the longest file name, as follows.

```
src/templater.rs            2-sided conflict
src/templater_parsers.rs    2-sided conflict
```

If there is a long file name, conflict descriptions will either start
or column 35 or one space from a file name, whichever is later.

Previously, a single tab was used to separate file name from conflict
description. This didn't look as nice as I hoped when multiple files
are involved. I also don't think `jj` generally uses tabs in output.
The tab uncovered a bug in a watcher program I was using.

src/commands.rs

@@ -2467,7 +2467,18 @@ fn print_conflicted_paths(
     formatter: &mut dyn Formatter,
     workspace_command: &WorkspaceCommandHelper,
 ) -> Result<(), CommandError> {
-    for (repo_path, conflict_id) in conflicts.iter() {
+    let formatted_paths = conflicts
+        .iter()
+        .map(|(path, _id)| workspace_command.format_file_path(path))
+        .collect_vec();
+    let max_path_len = formatted_paths.iter().map(|p| p.len()).max().unwrap_or(0);
+    let formatted_paths = formatted_paths
+        .into_iter()
+        .map(|p| format!("{:width$}", p, width = max_path_len.min(32) + 3));
+
+    for ((repo_path, conflict_id), formatted_path) in
+        std::iter::zip(conflicts.iter(), formatted_paths)
+    {
         let conflict = tree.store().read_conflict(repo_path, conflict_id)?;
         let n_adds = conflict.adds.len();
         let sides = n_adds.max(conflict.removes.len() + 1);
@@ -2506,11 +2517,7 @@ fn print_conflicted_paths(
             );
         }
 
-        write!(
+        write!(formatter, "{formatted_path} ",)?;
-            formatter,
-            "{}\t",
-            &workspace_command.format_file_path(repo_path)
-        )?;
         formatter.with_label("conflict_description", |formatter| {
             let print_pair = |formatter: &mut dyn Formatter, (text, label): &(String, &str)| {
                 formatter.with_label(label, |fmt| fmt.write_str(text))

tests/test_resolve_command.rs

@@ -63,7 +63,9 @@ fn test_resolution() {
         o 
         "###);
     insta::assert_snapshot!(test_env.jj_cmd_success(&repo_path, &["resolve", "--list"]), 
-    @"file	2-sided conflict");
+    @r###"
+    file    2-sided conflict
+    "###);
     insta::assert_snapshot!(
     std::fs::read_to_string(repo_path.join("file")).unwrap()
         , @r###"
@@ -207,7 +209,9 @@ conflict
        7    7: >>>>>>>
     "###);
     insta::assert_snapshot!(test_env.jj_cmd_success(&repo_path, &["resolve", "--list"]), 
-    @"file	2-sided conflict");
+    @r###"
+    file    2-sided conflict
+    "###);
 
     // Check that if merge tool leaves conflict markers in output file but
     // `merge-tool-edits-conflict-markers=false` or is not specified,
@@ -306,7 +310,9 @@ fn test_normal_conflict_input_files() {
         o 
         "###);
     insta::assert_snapshot!(test_env.jj_cmd_success(&repo_path, &["resolve", "--list"]), 
-    @"file	2-sided conflict");
+    @r###"
+    file    2-sided conflict
+    "###);
     insta::assert_snapshot!(
     std::fs::read_to_string(repo_path.join("file")).unwrap()
         , @r###"
@@ -345,7 +351,9 @@ fn test_baseless_conflict_input_files() {
         o 
         "###);
     insta::assert_snapshot!(test_env.jj_cmd_success(&repo_path, &["resolve", "--list"]), 
-    @"file	2-sided conflict");
+    @r###"
+    file    2-sided conflict
+    "###);
     insta::assert_snapshot!(
     std::fs::read_to_string(repo_path.join("file")).unwrap()
         , @r###"
@@ -374,7 +382,9 @@ fn test_too_many_parents() {
     create_commit(&test_env, &repo_path, "c", &["base"], &[("file", "c\n")]);
     create_commit(&test_env, &repo_path, "conflict", &["a", "b", "c"], &[]);
     insta::assert_snapshot!(test_env.jj_cmd_success(&repo_path, &["resolve", "--list"]), 
-    @"file	3-sided conflict");
+    @r###"
+    file    3-sided conflict
+    "###);
     // Test warning color
     insta::assert_snapshot!(test_env.jj_cmd_success(&repo_path, &["resolve", "--list", "--color=always"]), 
     @r###"