* message.nim: set max message size to 150KiB according to spec
Using KiB instead of KB because that seems more aligned with
the actual default defined in nim-libp2p (1024 * 1024)
Spec details: https://rfc.vac.dev/spec/64/#message-size
* test_protocol.nim: align test to current WakuMessage limit
* test_waku_client.nim: adapt test to MaxWakuMessageSize change
* make maxMessageSize configurable for wakunode2
* wakunode2 app now accepts max-num-bytes-msg-size with KiB, KB, or B units
* testlib/wakunode.nim: set maxMessageSize: "1024 KiB"
* test_waku_client.nim: remove duplicate check in "Valid Payload Sizes"
* set DefaultMaxWakuMessageSizeStr as the only source of truth
* external_config.nim: rename max-num-bytes-msg-size -> max-msg-size
Filter v2 rest api support implemented
Filter rest api documentation updated with v1 and v2 interface support.
Separated legacy filter rest interface
Fix code and tests of v2 Filter rest api
Filter v2 message push test added
Applied autoshard to Filter V2
Redesigned FilterPushHandling, code style, catch up apps and tests with filter v2 interface changes
Rename of FilterV1SubscriptionsRequest to FilterLegacySubscribeRequest, fix broken chat2 app, fix tests
Changed Filter v2 push handler subscription to simple register
Separate node's filterUnsubscribe and filterUnsubscribeAll
Ivan FB
NagyZoltanPeter
Hanno Cornelius