docs+config: document and catalog resolve env vars

src/config/env/catalog.rs

@@ -263,6 +263,30 @@ pub fn env_vars() -> Vec<EnvVarMeta> {
             applies_to: AppliesTo::CLI,
             default: None,
         },
+        EnvVarMeta {
+            name: "NYASH_ROOT",
+            description: "Repo root hint for tools/path resolution (optional)",
+            applies_to: AppliesTo::CLI,
+            default: None,
+        },
+        EnvVarMeta {
+            name: "NYASH_RESOLVE_TRACE",
+            description: "Trace using/prelude resolution (1=true)",
+            applies_to: AppliesTo::Compiler,
+            default: None,
+        },
+        EnvVarMeta {
+            name: "NYASH_RESOLVE_SEAM_DEBUG",
+            description: "Insert using boundary markers for diagnostics (1=true)",
+            applies_to: AppliesTo::Compiler,
+            default: None,
+        },
+        EnvVarMeta {
+            name: "NYASH_RESOLVE_DUMP_MERGED",
+            description: "Dump merged prelude+main source to the given path",
+            applies_to: AppliesTo::Compiler,
+            default: None,
+        },
         // Macro capabilities (Phase 286A)
         EnvVarMeta {
             name: "NYASH_MACRO_CAP_IO",