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/query.go

@@ -16,6 +16,8 @@ import (
 	"log"
 	"math/rand"
 	"sync"
+
+	"github.com/kami/maven/internal/say"
 )
 
 //go:embed query_ru_v1.json
@@ -65,7 +67,7 @@ var queryKeys = []string{
 
 // queryFloor — the literal each key falls back to when the file is unusable.
 // These are the exact strings that lived in Go before this file existed.
-var queryFloor = registerFloor(map[string]string{
+var queryFloor = say.RegisterFloor(map[string]string{
 	QueryUnknown:      "не знаю.",
 	QueryOtherDay:     "про другой день так не отвечу — спроси целиком.",
 	QueryPersonalNone: "не знаю — не нашла у тебя такой записи.",
@@ -95,12 +97,12 @@ var queryFloor = registerFloor(map[string]string{
 })
 
 // Queries picks a hand-written Russian query line. Safe for concurrent use.
-type Queries struct{ d *deck }
+type Queries struct{ d *say.Deck }
 
 // LoadQueries reads the embedded file. Pass a source to make the picking
 // reproducible in tests; nil seeds from the clock.
 func LoadQueries(src rand.Source) (*Queries, error) {
-	d, err := loadDeck(queryJSON, QuerySchemaVersion, queryKeys, queryFloor, src)
+	d, err := say.Load(queryJSON, QuerySchemaVersion, queryKeys, queryFloor, src)
 	if err != nil {
 		return nil, err
 	}
@@ -111,7 +113,7 @@ func LoadQueries(src rand.Source) (*Queries, error) {
 		{QueryFound, "{text}"}, {QueryPageText, "{text}"}, {QueryFeedsNew, "{items}"},
 		{QueryWeatherNow, "{location}"}, {QueryWeatherNow, "{temp}"}, {QueryWeatherNow, "{condition}"},
 	} {
-		if err := d.requirePlaceholder(req.key, req.ph); err != nil {
+		if err := d.RequirePlaceholder(req.key, req.ph); err != nil {
 			return nil, err
 		}
 	}
@@ -119,7 +121,7 @@ func LoadQueries(src rand.Source) (*Queries, error) {
 }
 
 // deck reads through a nil *Queries, which is the unloadable-file case.
-func (q *Queries) deck() *deck {
+func (q *Queries) deck() *say.Deck {
 	if q == nil {
 		return nil
 	}
@@ -128,11 +130,11 @@ func (q *Queries) deck() *deck {
 
 // Say returns one line for key, with the values filled into the frame.
 func (q *Queries) Say(key string, vars map[string]string) string {
-	return q.deck().text(key, vars)
+	return q.deck().Text(key, vars)
 }
 
 // Variants returns every line the file can produce, for the persona scorer.
-func (q *Queries) Variants() []string { return q.deck().variants() }
+func (q *Queries) Variants() []string { return q.deck().Variants() }
 
 var (
 	queryOnce sync.Once
@@ -158,5 +160,5 @@ func Q(key string, vars map[string]string) string { return DefaultQueries().Say(
 
 // IsQ reports whether text is a line key could have produced, for the tests.
 func IsQ(key string, vars map[string]string, text string) bool {
-	return DefaultQueries().deck().matches(key, vars, text)
+	return DefaultQueries().deck().Matches(key, vars, text)
 }