fix(input): return a bool|string|string[]|null enum from get_option

`InputInterface::get_option` returned `PhpMixed`, so the negation branch
of `Input::get_option` reproduced PHP's `return !$value;` as
`!value.as_bool().unwrap_or(false)`, which inverts the result for a
string value instead of leaving it `false`. It now returns
`InputOptionValue`, whose `to_bool` is PHP's truthiness cast.

The narrowing also removes the `Vec<PhpMixed>` element handling the
commands carried for array options: `as_array` hands back `&[String]`,
so the `filter_map(|v| v.as_string())` chains at eight call sites
collapse. Its other accessors keep `PhpMixed`'s names and meanings
(`is_null`, `as_bool`, `as_string`, `to_bool`), and
`From<InputOptionValue> for PhpMixed` covers the callers that feed the
value back into an `IndexMap<String, PhpMixed>` or a `PhpMixed`
parameter.

`Input` keeps its parsed options and `InputOption` its defaults as
`PhpMixed`, so `Input::get_option` is where the narrowing happens and
where a value outside the domain panics.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/crates/shirabe/src/command/outdated_command.rs b/crates/shirabe/src/command/outdated_command.rs
index 3994ab64..a89a1cd8 100644
--- a/crates/shirabe/src/command/outdated_command.rs
+++ b/crates/shirabe/src/command/outdated_command.rs
@@ -187,7 +187,7 @@ impl Command for OutdatedCommand {
         }
         args.insert(
             "--ignore-platform-req".to_string(),
-            input.borrow().get_option("ignore-platform-req")?,
+            input.borrow().get_option("ignore-platform-req")?.into(),
         );
         if input
             .borrow()
@@ -197,8 +197,14 @@ impl Command for OutdatedCommand {
         {
             args.insert("--ignore-platform-reqs".to_string(), PhpMixed::Bool(true));
         }
-        args.insert("--format".to_string(), input.borrow().get_option("format")?);
-        args.insert("--ignore".to_string(), input.borrow().get_option("ignore")?);
+        args.insert(
+            "--format".to_string(),
+            input.borrow().get_option("format")?.into(),
+        );
+        args.insert(
+            "--ignore".to_string(),
+            input.borrow().get_option("ignore")?.into(),
+        );
 
         let input = ArrayInput::new(
             args.into_iter()