fix(input): thread a typed InputValue through the input layer

Options and arguments were stored and passed as PhpMixed even though
Symfony only ever puts a string, a bool, a list of strings or null in
one. get_option already narrowed to InputOptionValue at the boundary;
this widens that enum into InputValue and pushes it through
InputInterface, InputOption/InputArgument defaults, the Input storage,
ArgvInput/ArrayInput/StringInput/CompletionInput, Command::add_option
and add_argument, and the Composer-side wrappers.

Two neighbouring string|int unions get types of their own:
InputDefinition::{get_argument,has_argument} take an ArgumentName, and
ArrayInput keys its parameters by ParameterName. has_parameter_option
and get_parameter_option take the values they look for as &[&str],
which is what PHP's `(array) $values` cast produced anyway.

Two behaviours change along the way. Input::set_option on a negated
option now negates with PHP's loose bool cast rather than treating a
non-bool as false, matching `!$value`. ArrayInput::parse now resolves
an integer key to an argument position instead of looking up an
argument literally named "0".

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

1 files changed, 4 insertions, 3 deletions

diff --git a/crates/shirabe-symfony-console/src/command/dump_completion_command.rs b/crates/shirabe-symfony-console/src/command/dump_completion_command.rs
index 4db6c233..49a66f6d 100644
--- a/crates/shirabe-symfony-console/src/command/dump_completion_command.rs
+++ b/crates/shirabe-symfony-console/src/command/dump_completion_command.rs
@@ -6,6 +6,7 @@ use crate::completion::{CompletionSuggestions, StringOrSuggestion};
 use crate::input::InputArgument;
 use crate::input::InputInterface;
 use crate::input::InputOption;
+use crate::input::InputValue;
 use crate::output::OutputInterface;
 use crate::output::output_interface;
 use shirabe_php_shim::{PhpMixed, impl_php_class};
@@ -189,14 +190,14 @@ impl Command for DumpCompletionCommand {
             "shell",
             Some(InputArgument::OPTIONAL),
             "The shell type (e.g. \"bash\"), the value of the \"$SHELL\" env var will be used if this is not given",
-            PhpMixed::Null,
+            InputValue::Null,
         )?;
         self.inner.add_option(
             "debug",
-            PhpMixed::Null,
+            None,
             Some(InputOption::VALUE_NONE),
             "Tail the completion debug log",
-            PhpMixed::Null,
+            InputValue::Null,
         )?;
 
         Ok(())