feat: bind config launcher records on evidence

A launcher record citing a config, option or feature file binds only
when the platform's code installs the file (installs), its launch code
was read for what replaces it (overrides), and the emulator's profile
shows where the shipped build loads it and reads each key
(config_reads, read at pin_build). Unproven records place no file and
hand no directory. verify, cross_reference and the platform page list
them apart, outside severity and --strict.

scripts/common.py

@@ -3189,11 +3189,12 @@ def standalone_bindings_for(
 
     ``systems`` are those the entry is launched for (entry_launch_systems).
     """
-    declared = profile.get("standalone_directories") or []
-    pools = profile.get("standalone_pools") or {}
+    from launchers import directory_handles, pool_folders, standalone_bindings  # noqa: PLC0415
+
+    declared = directory_handles(profile)
+    pools = pool_folders(profile)
     if not declared and not pools:
         return {}
-    from launchers import standalone_bindings  # noqa: PLC0415
 
     names = {emu_name, *(str(c) for c in profile.get("cores") or [])}
     layout = [
@@ -3298,9 +3299,9 @@ def platform_layouts(
 
     # The layout folders a search setting stands for (standalone_pools):
     # bound, the launcher passes the setting and the default is not read.
-    pool_folders = {
-        str(v).strip("/") for v in (profile.get("standalone_pools") or {}).values()
-    } - {""}
+    from launchers import pool_folders as _pool_folders  # noqa: PLC0415
+
+    pool_folders = {v.strip("/") for v in _pool_folders(profile).values()} - {""}
 
     def passed_setting(entry: dict) -> bool:
         layout = str(standalone_layout_path(entry, profile) or "")