Add entrypoints to tool list (#4661)

<!--
Thank you for contributing to uv! To help us out with reviewing, please
consider the following:

- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title?
- Does this pull request include references to any relevant issues?
-->
Closes #4654 
## Summary

The purpose of this is to show the entrypoints of each tool when running
`uv tool list` as below:

```
$ uv tool list
black
    black
    blackd

```

I used the proposed formatting as it was written in #4653 by @blueraft.
I had to use spaces instead of tabs in order to make the test
successful. Indeed in the test we are using a raw string and I did not
manage to make the test pass when escaping the tab in the list.rs file
so I used spaces everywhere.

I had a deeper look into #4653 as well but it is more difficult as we
need to get the version of the tool in the Tool object, I will continue
on this next one later.

Please tell me if anything else is needed I tried to follow the
contribution guidelines but I might have forgotten something.
Have a great day!


## Test Plan

`cargo clippy`

then by using the local version of uv as described in the Readme.md. 


```
my-computer :~/mypath/uv$ cargo run -- tool list
   Compiling uv-cli v0.0.1 (/mypath/uv/crates/uv-cli)
   Compiling uv v0.2.18 (/mypath/uv/crates/uv)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.69s
     Running `target/debug/uv tool list`
warning: `uv tool list` is experimental and may change without warning.
black
  black
  blackd
isort
  isort
  isort-identify-imports

```

and 

`cargo test tool_list`

---------

Co-authored-by: Zanie Blue <[email protected]>

crates/uv/src/commands/tool/list.rs

@@ -25,9 +25,14 @@ pub(crate) async fn list(preview: PreviewMode, printer: Printer) -> Result<ExitS
         return Ok(ExitStatus::Success);
     }
 
-    // TODO(zanieb): Track and display additional metadata, like entry points
-    for (name, _tool) in tools {
+    for (name, tool) in tools {
+        // Output tool name
         writeln!(printer.stdout(), "{name}")?;
+
+        // Output tool entrypoints
+        for entrypoint in tool.entrypoints() {
+            writeln!(printer.stdout(), "    {}", &entrypoint.name)?;
+        }
     }
 
     Ok(ExitStatus::Success)

crates/uv/tests/tool_list.rs

@@ -8,7 +8,7 @@ mod common;
 
 #[test]
 fn tool_list() {
-    let context = TestContext::new("3.12");
+    let context = TestContext::new("3.12").with_filtered_exe_suffix();
     let tool_dir = context.temp_dir.child("tools");
     let bin_dir = context.temp_dir.child("bin");
 
@@ -28,15 +28,17 @@ fn tool_list() {
     exit_code: 0
     ----- stdout -----
     black
-
+        black
+        blackd
+    
     ----- stderr -----
     warning: `uv tool list` is experimental and may change without warning.
     "###);
 }
 
 #[test]
 fn tool_list_empty() {
-    let context = TestContext::new("3.12");
+    let context = TestContext::new("3.12").with_filtered_exe_suffix();
     let tool_dir = context.temp_dir.child("tools");
     let bin_dir = context.temp_dir.child("bin");
 
@@ -55,7 +57,7 @@ fn tool_list_empty() {
 
 #[test]
 fn tool_list_missing_receipt() {
-    let context = TestContext::new("3.12");
+    let context = TestContext::new("3.12").with_filtered_exe_suffix();
     let tool_dir = context.temp_dir.child("tools");
     let bin_dir = context.temp_dir.child("bin");