Folder restructure (#274)

* Change folder structure to {v1,v2,common}/...

Addresses https://github.com/status-im/nim-waku/issues/261

* Update waku.nimble paths

* Flatten paths

* Fix import paths

* Pull out utils folder for nat

* Pull out waku_types to top level for v2

* Fix test import paths

* Remove old READMEs and replace with one liner

* Update README and split v1 and v2

* Skeleton READMEs

* Update README.md

Co-authored-by: Kim De Mey <kim.demey@gmail.com>

* Update README.md

Co-authored-by: Kim De Mey <kim.demey@gmail.com>

Co-authored-by: Kim De Mey <kim.demey@gmail.com>

examples/v1/example.nim

@@ -1,9 +1,9 @@
 import
   confutils, chronicles, chronos, stew/byteutils, stew/shims/net as stewNet,
   eth/[keys, p2p],
-  ../../waku/protocol/v1/waku_protocol,
-  ../../waku/node/v1/waku_helpers,
-  ../../waku/node/common,
+  ../../waku/v1/protocol/waku_protocol,
+  ../../waku/v1/node/waku_helpers,
+  ../../waku/common/utils/nat,
   ./config_example
 
 ## This is a simple Waku v1 example to show the Waku v1 API usage.

examples/v2/basic2.nim

@@ -8,8 +8,10 @@ import
   libp2p/crypto/[crypto,secp],
   eth/keys,
   json_rpc/[rpcclient, rpcserver],
-  ../../waku/node/v2/[config, wakunode2, waku_types],
-  ../../waku/node/common
+  ../../waku/v2/node/[config, wakunode2],
+  ../../waku/common/utils/nat,
+  ../../waku/v2/waku_types
+
 
 type
   Topic* = waku_types.Topic

examples/v2/chat2.nim

@@ -19,9 +19,10 @@ import libp2p/[switch,                   # manage transports, a single entry poi
                protocols/secure/secio,   # define the protocol of secure input / output, allows encrypted communication that uses public keys to validate signed messages instead of a certificate authority like in TLS
                muxers/muxer,             # define an interface for stream multiplexing, allowing peers to offer many protocols over a single connection
                muxers/mplex/mplex]       # define some contants and message types for stream multiplexing
-import   ../../waku/node/v2/[config, wakunode2, waku_types, waku_payload],
-         ../../waku/protocol/v2/[waku_relay, waku_store, waku_filter],
-         ../../waku/node/common
+import   ../../waku/v2/node/[config, wakunode2, waku_payload],
+         ../../waku/v2/protocol/[waku_relay, waku_store, waku_filter],
+         ../../waku/common/utils/nat,
+         ../../waku/v2/waku_types
 
 const Help = """
   Commands: /[?|help|connect|disconnect|exit]