Add support for OBJECT FREQ

[dengliming]

Resolves #1684

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[codecov]

Codecov Report

Merging #1686 (7cb6011) into main (80b4018) will increase coverage by 0.03%.
The diff coverage is 85.71%.

@@             Coverage Diff              @@
##               main    #1686      +/-   ##
============================================
+ Coverage     78.31%   78.35%   +0.03%     
- Complexity     6723     6729       +6     
============================================
  Files           507      507              
  Lines         22649    22655       +6     
  Branches       2462     2462              
============================================
+ Hits          17738    17751      +13     
+ Misses         3764     3762       -2     
+ Partials       1147     1142       -5     

Impacted Files	Coverage Δ	Complexity Δ
...e/api/coroutines/RedisKeyCoroutinesCommandsImpl.kt	2.38% <0.00%> (-0.06%)	1.00 <0.00> (ø)
...va/io/lettuce/core/AbstractRedisAsyncCommands.java	96.46% <100.00%> (+<0.01%)	488.00 <1.00> (+1.00)
...io/lettuce/core/AbstractRedisReactiveCommands.java	89.92% <100.00%> (+0.01%)	477.00 <1.00> (+1.00)
...main/java/io/lettuce/core/RedisCommandBuilder.java	95.70% <100.00%> (+<0.01%)	534.00 <1.00> (+1.00)
.../java/io/lettuce/core/protocol/CommandKeyword.java	100.00% <100.00%> (ø)	3.00 <0.00> (ø)
...e/core/masterreplica/SentinelTopologyProvider.java	81.08% <0.00%> (-2.71%)	9.00% <0.00%> (-1.00%)
...a/io/lettuce/core/protocol/ConnectionWatchdog.java	78.88% <0.00%> (-1.87%)	39.00% <0.00%> (-1.00%)
...core/cluster/ClusterDistributionChannelWriter.java	79.62% <0.00%> (-0.47%)	58.00% <0.00%> (-1.00%)
.../io/lettuce/core/dynamic/ReactiveTypeAdapters.java	86.95% <0.00%> (+0.43%)	1.00% <0.00%> (ø%)
...ce/core/masterreplica/SentinelTopologyRefresh.java	85.16% <0.00%> (+0.64%)	36.00% <0.00%> (ø%)
... and 3 more

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[mp911de]

This line breaks OBJECT IDLETIME

[mp911de]

Thank you for your contribution. That's merged and polished now.