public: publish selfhost snapshot to public repo (SSOT using + AST merge + JSON VM fixes)

- SSOT using profiles (aliases/packages via nyash.toml), AST prelude merge
- Parser/member guards; Builder pin/PHI and instance→function rewrite (dev on)
- VM refactors (handlers split) and JSON roundtrip/nested stabilization
- CURRENT_TASK.md updated with scope and acceptance criteria

Notes: dev-only guards remain togglable via env; no default behavior changes for prod.

plugins/nyash-json-plugin/src/ffi.rs

@@ -5,7 +5,8 @@ use std::os::raw::{c_char, c_void};
 // External C functions for yyjson provider
 extern "C" {
     pub fn nyash_json_shim_parse(text: *const c_char, len: usize) -> i32;
-    pub fn nyjson_parse_doc(text: *const c_char, len: usize, out_err_code: *mut i32) -> *mut c_void;
+    pub fn nyjson_parse_doc(text: *const c_char, len: usize, out_err_code: *mut i32)
+        -> *mut c_void;
     pub fn nyjson_doc_free(doc: *mut c_void);
     pub fn nyjson_doc_root(doc: *mut c_void) -> *mut c_void;
     pub fn nyjson_is_null(v: *mut c_void) -> i32;
@@ -22,4 +23,4 @@ extern "C" {
     pub fn nyjson_arr_get_val(v: *mut c_void, idx: usize) -> *mut c_void;
     pub fn nyjson_obj_size_val(v: *mut c_void) -> usize;
     pub fn nyjson_obj_get_key(v: *mut c_void, key: *const c_char) -> *mut c_void;
-}
+}