Move Waku node into v0 folder; hacky vendor dir; fix Makefile path

Makefile

@@ -1,10 +1,10 @@
 all: wakunode start_network quicksim
 
-start_network: waku/start_network.nim
-	nim c --threads:on -o:build/start_network waku/start_network.nim
+start_network: node/v0/start_network.nim
+	nim c --threads:on -o:build/start_network node/v0/start_network.nim
 
-quicksim: waku/quicksim.nim
-	nim c --threads:on -o:build/quicksim waku/quicksim.nim
+quicksim: node/v0/quicksim.nim
+	nim c --threads:on -o:build/quicksim node/v0/quicksim.nim
 
-wakunode: waku/wakunode.nim
-	nim c --threads:on -o:build/wakunode waku/wakunode.nim
+wakunode: node/v0/wakunode.nim
+	nim c --threads:on -o:build/wakunode node/v0/wakunode.nim

node/v0/quicksim.nim

@@ -1,7 +1,7 @@
 import
   os, strformat, chronicles, json_rpc/[rpcclient, rpcserver], nimcrypto/sysrand,
   eth/common as eth_common, eth/keys, eth/p2p/rlpx_protocols/waku_protocol,
-  ../vendor/nimbus/nimbus/rpc/[hexstrings, rpc_types, waku],
+  ../../vendor/nimbus/nimbus/rpc/[hexstrings, rpc_types, waku],
   options as what # TODO: Huh? Redefinition?
 
 from os import DirSep

node/v0/wakunode.nim

@@ -4,7 +4,7 @@ import
   eth/[keys, p2p, async_utils], eth/common/utils, eth/net/nat,
   eth/p2p/[discovery, enode, peer_pool, bootnodes, whispernodes],
   eth/p2p/rlpx_protocols/[whisper_protocol, waku_protocol, waku_bridge],
-  ../vendor/nimbus/nimbus/rpc/[waku, wakusim, key_storage]
+  ../../vendor/nimbus/nimbus/rpc/[waku, wakusim, key_storage]
 
 const clientId = "Nimbus waku node"