Add last entry id for XREADs and support XREADs reply as map

[sazzad16]

• Added a last entry id for XREAD and XREADGROUP commands (Resolves Support XREAD, XREADGROUP reading from last message of stream #3732)
• Support map replies for XREAD and XREADGROUP commands (currently have list of key-value pairs)

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Task breakdown (ToDo):

• new StreamEntryID for less confusion
• new XREAD and XREADGROUP support as map
• command tests
• pipeline tests

[codecov]

Codecov Report

Attention: Patch coverage is 87.75510% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 79.48%. Comparing base (bad18b9) to head (7e54283).

Files	Patch %	Lines
.../main/java/redis/clients/jedis/BuilderFactory.java	90.47%	1 Missing and 1 partial ⚠️
.../main/java/redis/clients/jedis/PipeliningBase.java	0.00%	2 Missing ⚠️
...rc/main/java/redis/clients/jedis/UnifiedJedis.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3791      +/-   ##
============================================
+ Coverage     79.44%   79.48%   +0.03%     
- Complexity     5685     5695      +10     
============================================
  Files           301      301              
  Lines         15231    15274      +43     
  Branches       1186     1190       +4     
============================================
+ Hits          12101    12140      +39     
- Misses         2551     2556       +5     
+ Partials        579      578       -1     

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[gerzse]

This could be XREAD_LAST_ENTRY = MAXIMUM_ID, to make it obvious that it is only an alias. Somehow I find it more informative to have different names, depending on the usage context.