docs: replace jj files -> jj file list

`jj files` is now deprecated

cli/src/cli_util.rs

@@ -2391,8 +2391,8 @@ pub struct EarlyArgs {
     pub color: Option<ColorChoice>,
     /// Silence non-primary command output
     ///
-    /// For example, `jj files` will still list files, but it won't tell you if
-    /// the working copy was snapshotted or if descendants were rebased.
+    /// For example, `jj file list ` will still list files, but it won't tell
+    /// you if the working copy was snapshotted or if descendants were rebased.
     ///
     /// Warnings and errors will still be printed.
     #[arg(long, global = true, action = ArgAction::SetTrue)]

cli/tests/cli-reference@.md.snap

@@ -177,7 +177,7 @@ To get started, see the tutorial at https://github.com/martinvonz/jj/blob/main/d
 * `--color <WHEN>` — When to colorize output (always, never, debug, auto)
 * `--quiet` — Silence non-primary command output
 
-   For example, `jj files` will still list files, but it won't tell you if the working copy was snapshotted or if descendants were rebased.
+   For example, `jj file list ` will still list files, but it won't tell you if the working copy was snapshotted or if descendants were rebased.
 
    Warnings and errors will still be printed.
 * `--no-pager` — Disable the pager

docs/filesets.md

@@ -74,7 +74,7 @@ jj diff '~Cargo.lock'
 List files in `src` excluding Rust sources.
 
 ```
-jj files 'src ~ glob:"**/*.rs"'
+jj file list 'src ~ glob:"**/*.rs"'
 ```
 
 Split a revision in two, putting `foo` into the second commit.

docs/git-comparison.md

@@ -196,7 +196,7 @@ parent.
     </tr>
     <tr>
       <td>Search among files versioned in the repository</td>
-      <td><code>grep foo $(jj files)</code>, or <code>rg --no-require-git foo</code></td>
+      <td><code>grep foo $(jj file list)</code>, or <code>rg --no-require-git foo</code></td>
       <td><code>git grep foo</code></td>
     </tr>
     <tr>