refactor(json): make json encode helpers accept serde::Serialize

Change json_encode/json_encode_ex and JsonFile::encode/encode_with_options
to take a generic serde::Serialize value instead of &PhpMixed, implement
Serialize for PhpMixed/ArrayObject, and drop the PhpMixed::String wrapping
at JsonManipulator call sites in favor of passing raw values.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/crates/shirabe/src/json/json_file.rs b/crates/shirabe/src/json/json_file.rs
index 06f3946..0aa44fc 100644
--- a/crates/shirabe/src/json/json_file.rs
+++ b/crates/shirabe/src/json/json_file.rs
@@ -426,11 +426,14 @@ impl JsonFile {
         Ok(true)
     }
 
-    pub fn encode(data: &PhpMixed) -> String {
+    pub fn encode<T: serde::Serialize + ?Sized>(data: &T) -> String {
         Self::encode_with_options(data, JsonEncodeOptions::default())
     }
 
-    pub fn encode_with_options(data: &PhpMixed, options: JsonEncodeOptions) -> String {
+    pub fn encode_with_options<T: serde::Serialize + ?Sized>(
+        data: &T,
+        options: JsonEncodeOptions,
+    ) -> String {
         let json = json_encode_ex(data, options.to_flags());
 
         let json = match json {