Add examples

examples/pwd-to-signing.test.ts

@@ -0,0 +1,17 @@
+import {expect} from 'bun:test'
+
+import {hkdf, pbkdf, Usage} from '../src/kdf'
+import {get_pubkey, sign, verify} from '../src/signature'
+
+const salt = new Uint8Array(32)
+const pwd = "test"
+const message = new TextEncoder().encode("Yeet")
+
+const kd = await pbkdf(salt, pwd)
+const privk = await hkdf(kd, Usage.sign) as Uint8Array
+const pubk = await get_pubkey(privk)
+
+const sig = await sign(message, privk)
+const verification = await verify(message, pubk, sig)
+expect(verification).toBeTrue()
+console.log("pwd-to-signing OK")