engine/exchanges: Add exchange currency state subsystem (#774)

* state: Add management system (init)

* linter: fix

* engine: gofmt

* gct: after merge fixup

* documentation: add

* rpc: implement services for testing

* gctcli: gofmt state_management.go

* documentation: reinstate lost information

* state: Add pair check to determine trading operation

* exchanges: add interface for specific state scoped subsystem functionality

* engine/order_man: reduce code footprint using new method

* RPC: implement pair trading request and change exported name to something specific to state

* engine: add tests

* engine: Add to withdraw manager

* documentation: reinstate soxipy in contrib. list

* engine: const fake name

* Glorious: NITERINOS

* merge: fix issues

* engine: csm incorporate service name into log output

* engine: fix linter issues

* gct: fix tests

* currencystate: remove management type

* rpc: fix tests

* backtester: fix tests

* Update engine/currency_state_manager.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* Update engine/currency_state_manager.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* Update exchanges/currencystate/currency_state.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* Update exchanges/alert/alert.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* Update exchanges/alert/alert.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* glorious: nits

* config: integrate with config and remove flag delay adjustment

* gctcli: fix issues after name changes

* engine: gofmt manager file

* Update engine/rpcserver.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* engine: Add enable/disable manager functions, add default popoulation for potential assets

* linter: fix

* engine/test: bump subsystem count

* Update engine/currency_state_manager.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* Update exchanges/bithumb/bithumb.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

* glorious: nits addressed

* alert: fix commenting for its generalized purpose

* glorious: nits

* engine: use standard string in log output

* bitfinex: apply patch, thanks @thrasher-

* bitfinex: fix spelling

* engine/currencystate: Add logs/fix logs

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

exchanges/orderbook/unsafe.go

@@ -3,6 +3,8 @@ package orderbook
 import (
 	"sync"
 	"time"
+
+	"github.com/thrasher-corp/gocryptotrader/exchanges/alert"
 )
 
 // Unsafe is an exported linked list reference to the current bid/ask heads and
@@ -20,7 +22,7 @@ type Unsafe struct {
 	// protocol then this book is not considered live and cannot be trusted.
 	UpdatedViaREST *bool
 	LastUpdated    *time.Time
-	*Alert
+	*alert.Notice
 }
 
 // Lock locks down the underlying linked list which inhibits all pending updates
@@ -55,7 +57,7 @@ func (d *Depth) GetUnsafe() Unsafe {
 		BidHead:        &d.bids.linkedList.head,
 		AskHead:        &d.asks.linkedList.head,
 		m:              &d.m,
-		Alert:          &d.Alert,
+		Notice:         &d.Notice,
 		UpdatedViaREST: &d.options.restSnapshot,
 		LastUpdated:    &d.options.lastUpdated,
 	}