say: move the copy deck into a package memory can import (V-506)

The summaries family is spoken by internal/memory, internal/morning and
internal/tasks. internal/phraser already imports internal/memory, so the
deck cannot stay in phraser without a cycle.

internal/say is a leaf: embed, json, math/rand, strings, sync. The four
phraser families keep their files and their floors and now call say.Load,
*say.Deck, Text, Matches, Variants, RequirePlaceholder and RegisterFloor.
No copy changed and no behaviour changed.

internal/phraser/eval/fallbacks_test.go

@@ -8,9 +8,10 @@ import (
 	"github.com/kami/maven/internal/phraser"
 )
 
-// TestFallbackPersona scores every line in every hand-written line family on the persona checks the nudges already pass. These lines are
-// heard out loud and they live in a JSON file now, so a reworded variant that
-// says "рад" or "вы" would otherwise reach him with nothing in between.
+// TestFallbackPersona scores every line in every hand-written family on the
+// persona checks the nudges already pass. These lines are heard out loud and
+// they live in a JSON file now, so a reworded variant that says "рад" or "вы"
+// would otherwise reach him with nothing in between.
 //
 // Only the persona checks run. Mood and topic belong to a nudge, and these are
 // not nudges.