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/lang/permap/maps/alpha/instances/-1_0.lres

@@ -0,0 +1,3 @@
+# the chunk west of the origin: {cx} is -1
+t1 { kind: MDL_TENT, x: -10.0, z: 3.0 }
+t2 { kind: 2, x: -20.5 }

examples/lang/permap/maps/alpha/instances/0_2.lres

@@ -0,0 +1 @@
+r1 { kind: 1, x: 3.0, z: 130.0 }

examples/lang/permap/maps/alpha/props.lres

@@ -0,0 +1,6 @@
+# alpha's props: a constant by name, a nested list of records, a list of strings, a nested
+# record, a fn by name, and a cross-row @Ref (home names a row of alpha's spots.lres)
+tent { model: MDL_TENT, yaw: 90.0, role: "camp", home: "fire", tags: ["guy", "fly"],
+       pts: [{ x: 1.0, z: 2.0 }, { x: 3.5, z: -4 }], at: { x: 5 }, pick: fn twice }
+bench { model: MDL_BENCH, scale: G_SCALE, lit: true, home: "" }
+sign { model: 3, role: "say \"hi\"" }

examples/lang/permap/maps/alpha/spots.lres

@@ -0,0 +1,2 @@
+fire { kind: "camp", x: 1.0 }
+view { kind: "view", x: -2.5 }