Split migrations into separate files

migrations/0003_RADKFILE.sql

@@ -0,0 +1,11 @@
+CREATE TABLE "RADKFILE" (
+  "kanji" CHAR(1) NOT NULL,
+  "radical" CHAR(1) NOT NULL,
+  PRIMARY KEY ("kanji", "radical")
+) WITHOUT ROWID;
+
+CREATE INDEX "RADK" ON "RADKFILE"("radical");
+CREATE INDEX "KRAD" ON "RADKFILE"("kanji");
+
+CREATE VIEW "RADKFILE_Radicals" AS
+SELECT DISTINCT "radical" FROM "RADKFILE";