exchanges: Update OKCoin V5 exchange support (#1206)

* starting public endpoints

* Adding public endpoints

* added public spot market endpoints

* websocket subscriptions updates

* websocket push data handlers completing

* linter fix

* Added funding private endpoints

* Adding authenticated account endpoints

* Added fiat and OTC-RFQ authenticated endpoints

* trading authenticated endpoints

* completing trade endpoints and add public wrapper endpoints

* Authenticated wrapper functions and corresponding unit test

* Adding authenticated websocket endpoint and fixing wrapper functions

* Documentation and exchange websocket update

* update websocket orderbook checksum handling

* linter issues fix and unit test update

* remove invalid orderbook endpoint and unit test

* Documentation, handlers, and model types update

* minot fix

* Minor fixes

* Updating unit tests and added missing endpoints

* Add missing credential check

* Minor unit test fixes

* fix minor linter issue

* add snaphot test unit test

* Fix on update checksum and documentation update

* update exchange, add UpdateOrderExecutionLimits, and update documentation

* Minor fix on tickers fetching

* Minor websocket fix and smaill unit tests

* Minor websocket and naming fixes

* uncomment default channels

* Fix type and unit test issues

* websocket channels and data handling update

* Update Advanced-Algo websocket handling and minor fixes

* documentation and minor code fixes

* Fix name changes

* documentation contribution update

* intervalToString method update

* fix exchange_wrapper_standard tests

* Fix minor issues based on exchange_wrapper_standards_test

* Fix wrapper extended candlestick check

* websocket orders fetching error check method update

* Exchange name check and change

* docs: Add missing contributors

---------

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

docs/ADD_NEW_EXCHANGE.md

@@ -216,7 +216,7 @@ Yes means supported, No means not yet implemented and NA means protocol unsuppor
 | ItBit | Yes | NA | No |
 | Kraken | Yes | Yes | NA |
 | Lbank | Yes | No | NA |
-| OKCoin International | Yes | Yes | No |
+| Okcoin | Yes | Yes | No |
 | Okx | Yes | Yes | NA |
 | Poloniex | Yes | Yes | NA |
 | Yobit | Yes | NA | NA |
@@ -246,7 +246,7 @@ var Exchanges = []string{
 	"itbit",
 	"kraken",
 	"lbank",
-	"okcoin international",
+	"okcoin",
 	"okx",
 	"poloniex",
 	"yobit",

docs/MULTICHAIN_TRANSFER_SUPPORT.md

@@ -64,7 +64,7 @@ $ ./gctcli withdrawcryptofunds --exchange=binance --currency=USDT --address=TJU9
 | ItBit | No | No | |
 | Kraken | Yes | Yes | Front-end and API don't match total available transfer chains |
 | Lbank | No | No | |
-| OKCoin International | No | No | Requires API update to version 5 |
+| Okcoin | Yes | Yes | |
 | Okx | Yes | Yes | |
 | Poloniex | Yes | Yes | |
 | Yobit | No | No | |