refactor(json): model JsonFile encode/write options as a typed struct

Replace the i64 bitmask + encode_with_indent split with a JsonEncodeOptions
struct (Default = JSON_UNESCAPED_SLASHES|JSON_PRETTY_PRINT|JSON_UNESCAPED_UNICODE,
default indent). encode/write each get a default form plus an explicit
encode_with_options/write_with_options variant, mirroring PHP's optional
$options argument. write_with_options always encodes with self.indent, matching
PHP write().

Also reconcile call sites with the PHP sources: most ported sites passed 0 where
Composer omits the argument (= default flags), so JsonManipulator/ShowCommand and
JsonConfigSource now use the default options; only ComposerRepository and Locker
genuinely pass 0.

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

1 files changed, 3 insertions, 4 deletions

diff --git a/crates/shirabe/src/command/check_platform_reqs_command.rs b/crates/shirabe/src/command/check_platform_reqs_command.rs
index bfef6a5..edacf0b 100644
--- a/crates/shirabe/src/command/check_platform_reqs_command.rs
+++ b/crates/shirabe/src/command/check_platform_reqs_command.rs
@@ -312,10 +312,9 @@ impl CheckPlatformReqsCommand {
                 })
                 .collect();
 
-            io.write(&JsonFile::encode(
-                &PhpMixed::List(rows.into_iter().map(Box::new).collect()),
-                448,
-            ));
+            io.write(&JsonFile::encode(&PhpMixed::List(
+                rows.into_iter().map(Box::new).collect(),
+            )));
         } else {
             let rows: Vec<PhpMixed> = results
                 .iter()