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/provider.rs

@@ -31,8 +31,8 @@ pub enum NodeRep {
 
 // Document instance
 pub struct DocInst {
-    pub root: Option<Arc<Value>>,  // Serde provider
-    pub doc_ptr: Option<usize>,    // Yyjson provider (opaque pointer value)
+    pub root: Option<Arc<Value>>, // Serde provider
+    pub doc_ptr: Option<usize>,   // Yyjson provider (opaque pointer value)
     pub last_err: Option<String>,
 }
 
@@ -66,4 +66,4 @@ pub fn provider_parse(text: &str) -> Result<Value, String> {
             serde_json::from_str::<Value>(text).map_err(|e| e.to_string())
         }
     }
-}
+}