wip(btc): add dataabase implementation

Co-authored-by: Gaze <gazenw@users.noreply.github.com>

modules/bitcoin/internal/repository/postgres/postgres.go

@@ -0,0 +1,18 @@
+package postgres
+
+import (
+	"github.com/gaze-network/indexer-network/internal/postgres"
+	"github.com/gaze-network/indexer-network/modules/bitcoin/internal/repository/postgres/gen"
+)
+
+type Repository struct {
+	db      postgres.DB
+	queries *gen.Queries
+}
+
+func NewRepository(db postgres.DB) *Repository {
+	return &Repository{
+		db:      db,
+		queries: gen.New(db),
+	}
+}