feat: crypto interface (#2)

* docs: initial crypto readme

* feat: add basic crypto interface test suite

* feat: add optional remotepeer for inbound

feat: add errors export

* docs(fix): update src/crypto/README.md

Co-Authored-By: Vasco Santos <vasco.santos@moxy.studio>

test/crypto/compliance.spec.js

@@ -0,0 +1,13 @@
+/* eslint-env mocha */
+'use strict'
+
+const tests = require('../../src/crypto/tests')
+const mockCrypto = require('./mock-crypto')
+
+describe('compliance tests', () => {
+  tests({
+    setup () {
+      return mockCrypto
+    }
+  })
+})