Unhide uv audit (#18540)

## Summary

Almost all of the MVP roadmap is done, so this unhides `uv audit`.

See #18506.

## Test Plan

NFC, but will bump the snapshots.

---------

Signed-off-by: William Woodruff <william@astral.sh>

crates/uv-cli/src/lib.rs

@@ -1182,10 +1182,11 @@ pub enum ProjectCommand {
         after_long_help = ""
     )]
     Format(FormatArgs),
-    /// Audit the project's lockfile for known vulnerabilities and unmaintained dependencies.
+    /// Audit the project's dependencies.
+    ///
+    /// Dependencies are audited for known vulnerabilities, as well
+    /// as 'adverse' statuses such as deprecation and quarantine.
     #[command(
-        // NOTE: Hidden while in development.
-        hide = true,
         after_help = "Use `uv help audit` for more details.",
         after_long_help = ""
     )]

crates/uv/tests/it/help.rs

@@ -27,6 +27,7 @@ fn help() {
       export                     Export the project's lockfile to an alternate format
       tree                       Display the project's dependency tree
       format                     Format Python code in the project
+      audit                      Audit the project's dependencies
       tool                       Run and install commands provided by Python packages
       python                     Manage Python versions and installations
       pip                        Manage Python packages with a pip-compatible interface
@@ -108,6 +109,7 @@ fn help_flag() {
       export   Export the project's lockfile to an alternate format
       tree     Display the project's dependency tree
       format   Format Python code in the project
+      audit    Audit the project's dependencies
       tool     Run and install commands provided by Python packages
       python   Manage Python versions and installations
       pip      Manage Python packages with a pip-compatible interface
@@ -187,6 +189,7 @@ fn help_short_flag() {
       export   Export the project's lockfile to an alternate format
       tree     Display the project's dependency tree
       format   Format Python code in the project
+      audit    Audit the project's dependencies
       tool     Run and install commands provided by Python packages
       python   Manage Python versions and installations
       pip      Manage Python packages with a pip-compatible interface
@@ -908,6 +911,7 @@ fn help_unknown_subcommand() {
         export
         tree
         format
+        audit
         tool
         python
         pip
@@ -937,6 +941,7 @@ fn help_unknown_subcommand() {
         export
         tree
         format
+        audit
         tool
         python
         pip
@@ -995,6 +1000,7 @@ fn help_with_global_option() {
       export                     Export the project's lockfile to an alternate format
       tree                       Display the project's dependency tree
       format                     Format Python code in the project
+      audit                      Audit the project's dependencies
       tool                       Run and install commands provided by Python packages
       python                     Manage Python versions and installations
       pip                        Manage Python packages with a pip-compatible interface
@@ -1117,6 +1123,7 @@ fn help_with_no_pager() {
       export                     Export the project's lockfile to an alternate format
       tree                       Display the project's dependency tree
       format                     Format Python code in the project
+      audit                      Audit the project's dependencies
       tool                       Run and install commands provided by Python packages
       python                     Manage Python versions and installations
       pip                        Manage Python packages with a pip-compatible interface