fix: list only what a knulli board builds

KNULLI's es_systems.yml is Batocera's model: it lists every emulator
its configgen knows, and its Config.in selects many of them only on
x86_64 boards, which KNULLI has none of. The platform list now holds
what at least one board selects, read by the targets scraper, plus a
program the launcher runs from the BIOS folder (lexaloffle). 59 cores
and 44 standalone emulators leave the list, with their launcher records.

The targets scraper follows Config.in and every file it sources, so a
select a package declares itself counts (Batocera's mesa3d-rpi4 gives
the Pi 4 OpenGL). A sourced file absent at the pin is named and read as
empty: KNULLI 20260511 sources package/utils/vtree/Config.in, added in
June.

scripts/scraper/knulli_scraper.py

@@ -37,18 +37,17 @@ from .batocera_scraper import (
 )
 from .batocera_scraper import (
     _not_cores,
+    boards_build,
     configgen_cores,
     es_systems_by_system,
     es_systems_libretro_systems,
     extract_systems_dict,
-    package_names,
-    packages_and_programs,
     platform_systems,
-    repo_tree,
+    records_run,
     requirements_from_systems,
-    submodule_revision,
 )
 from .es_emulators import attach_system_cores
+from .targets.knulli_targets_scraper import Scraper as BoardTargets
 from .batocera_launchers import configs_root
 from .knulli_launchers import BATOCERA_SUBMODULE, extract_launchers
 from .knulli_launchers import configgen as knulli_configgen
@@ -134,15 +133,11 @@ class Scraper(BaseScraper):
             lambda path: self._fetch_text(_RAW.format(ref=self.tag) + path),
             lambda path: self._fetch_text(_BATOCERA_RAW.format(ref=revision) + path),
         )
-        # The packages KNULLI builds come from its own tree, its batocera
-        # submodule and its buildroot submodule: a default no package of
-        # them builds (suyu) is not run.
-        paths = repo_tree(REPO, self.tag)
-        paths += repo_tree("batocera-linux/batocera.linux", revision)
-        paths += repo_tree(
-            "knulli-cfw/buildroot", submodule_revision(REPO, "buildroot", self.tag)
-        )
-        built = packages_and_programs(package_names(paths), launchers)
+        # What runs is what at least one board builds, read by the targets
+        # scraper from the Kconfig of KNULLI's tree and its batocera and
+        # buildroot submodules (boards_build).
+        built = boards_build(BoardTargets().build_selection(self.tag), launchers)
+        launchers = records_run(launchers, built)
         cores, standalone, dual = configgen_cores(defaults, es_systems, dropped, built)
         # Each system's own list (psx, es_systems.yml:640-653: libretro
         # pcsx_rearmed, swanstation, mednafen_psx, then duckstation and