Added documentation for Active-Active (#3753)

* Added Active-Active documentation page

* Added documentation for Active-Active

* Refactored docs

* Refactored pipeline and transaction section

* Updated docs

* Extended list of words

* Re-write documentation

* Fixed spelling

* Update docs/multi_database.rst

Co-authored-by: Elena Kolevska <[email protected]>

* Apply suggested comments

* Fixed spelling

* Update docs/multi_database.rst

Co-authored-by: Elena Kolevska <[email protected]>

* Update docs/multi_database.rst

Co-authored-by: Elena Kolevska <[email protected]>

* Update docs/multi_database.rst

Co-authored-by: Elena Kolevska <[email protected]>

---------

Co-authored-by: Elena Kolevska <[email protected]>

Author: vladvildanov

.github/wordlist.txt

@@ -1,7 +1,9 @@
 APM
 ARGV
 BFCommands
+balancer
 CacheImpl
+cancelling
 CAS
 CFCommands
 CMSCommands
@@ -10,19 +12,32 @@ ClusterNodes
 ClusterPipeline
 ClusterPubSub
 ConnectionPool
+config
 CoreCommands
+DatabaseConfig
+DNS
+EchoHealthCheck
 EVAL
 EVALSHA
+failover
+FQDN
 Grokzen's
+Healthcheck
+HealthCheckPolicies
+healthcheck
+healthchecks
 INCR
 IOError
 Instrumentations
 JSONCommands
 Jaeger
 Ludovico
 Magnocavallo
+MultiDbConfig
+MultiDBClient
 McCurdy
 NOSCRIPT
+NoValidDatabaseException
 NUMPAT
 NUMPT
 NUMSUB
@@ -43,6 +58,7 @@ RedisInstrumentor
 RedisJSON
 RedisTimeSeries
 SHA
+SLA
 SearchCommands
 SentinelCommands
 SentinelConnectionPool
@@ -52,6 +68,8 @@ SpanKind
 Specfiying
 StatusCode
 TCP
+TemporaryUnavailableException
+TLS
 TOPKCommands
 TimeSeriesCommands
 Uptrace
@@ -91,6 +109,7 @@ json
 keyslot
 keyspace
 kwarg
+kwargs
 linters
 localhost
 lua