Extract shared types and add Regulation type with parsing methods

Move cookie banner types (CookieItem, Category, Regulation, BannerConfig,
etc.) into a dedicated types.ts file. Add a coredata.Regulation type with
parsing, JSON marshaling, and database scanning methods. Hardcode the
geoloc-import data directory since the submodule path is fixed.

Signed-off-by: Émile Ré <emile@getprobo.com>

cmd/geoloc-import/main.go

@@ -35,10 +35,9 @@ func main() {
 }
 
 func run() error {
-	var (
-		pgDSN   string
-		dataDir string
-	)
+	const dataDir = "pkg/geoloc/data/country-ip-blocks"
+
+	var pgDSN string
 
 	flag.StringVar(
 		&pgDSN,
@@ -46,12 +45,6 @@ func run() error {
 		os.Getenv("DATABASE_URL"),
 		"PostgreSQL connection URL (default: DATABASE_URL env)",
 	)
-	flag.StringVar(
-		&dataDir,
-		"data-dir",
-		"pkg/geoloc/data/country-ip-blocks",
-		"path to ipverse country-ip-blocks checkout",
-	)
 	flag.Parse()
 
 	if pgDSN == "" {