Add support for cap, a pow captcha, and implement on contact form

db/config.ts

@@ -0,0 +1,20 @@
+import { defineDb, defineTable, column } from "astro:db";
+
+const Cap_Challenges = defineTable({
+  columns: {
+    token: column.text({ primaryKey: true }),
+    data: column.json(),
+    expires: column.number(),
+  },
+});
+
+const Cap_Tokens = defineTable({
+  columns: {
+    key: column.text({ primaryKey: true }),
+    expires: column.number(),
+  },
+});
+
+export default defineDb({
+  tables: { Cap_Challenges, Cap_Tokens },
+});