tests: the map-scoped tables' example and rejected fixtures

examples/lang/permap (two maps, a chunked table with a negative, a positive and a
missing chunk, constants and fn by name, a nested list, a cross-row @Ref, a reload
shrinking in place, a bad file's file:line:col; built under arena strict with an @On
frame root), --check fixtures for a wrong field, a wrong type, an unknown constant and
a dangling cross-row @Ref, @Ref(PerMap) on an int, as PREFIX, and a @Unit warning.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/rejected/permap_maps/maps/m1/props.lres

@@ -0,0 +1,5 @@
+tent { model: MDL_TENT, home: "fire" }
+lamp { model: 1, colour: 3 }
+crate { model: "big" }
+bench { model: MDL_BENCH }
+sign { model: 2, scale: 0.5, home: "nowhere" }

examples/rejected/permap_maps/maps/m1/spots.lres

@@ -0,0 +1 @@
+fire { x: 1.0 }

examples/rejected/permap_maps/package.ludic

@@ -0,0 +1,2 @@
+# permap_maps.ludic's maps, each file with one thing `ludicc --check` must refuse
+maps "maps"

examples/rejected/permap_maps/permap_maps.ludic

@@ -0,0 +1,19 @@
+# permap_maps.ludic - `ludicc --check` reads every map directory and checks its tables against their
+# records. maps/m1 holds four mistakes, each refused at its file, line and column: a field the
+# record lacks, a value of the wrong type, a constant nobody declared, and a key naming no row.
+program PerMapMaps {
+  numbers float
+  const MDL_TENT: int = 7
+  property Spot { key: string = "", x: float = 0.0 }
+  @PerMap registry Spots of Spot from "spots.lres"
+  property PropRow {
+    key: string = ""
+    model: int = 0
+    scale: float = 1.0
+    @Ref(Spots) home: string = ""
+  }
+  @PerMap @ByKey registry Props of PropRow from "props.lres"
+  entry (props: mut Props) {
+    print(`{props_load(props, "m1")}`)
+  }
+}