Add RFC6901 json pointer support

[leonchen83]

Now Path can convert RFC6901 style path to json path for example Path.ofJosnPointer("/abc/0") can convert to Path.of(".[\"abc\"].[0]")

the limitation of JsonPointer path is /abc/0 always convert to .[\"abc\"].[0] and not .[\"abc\"].[\"0\"] if users want to use .abc.0, they should use Path.of(".abc.0") instead of Path.ofJosnPointer("/abc/0")

[sazzad16]

@leonchen83 We generally avoid adding utilities. Perhaps RedisJSON itself can start supporting RFC6901?

[leonchen83]

@sazzad16 yes. but since 2017 to present. there is not an implementation of rfc6901 from RedisJSON. related issue #3 , #18. so client side implementation is an option

[codecov-commenter]

Codecov Report

Merging #2930 (6a260f3) into master (80d01d2) will increase coverage by 0.17%. The diff coverage is 85.45%.

:exclamation: Current head 6a260f3 differs from pull request most recent head e18598c. Consider uploading reports for the commit e18598c to get more accurate results

@@             Coverage Diff              @@
##             master    #2930      +/-   ##
============================================
+ Coverage     55.14%   55.32%   +0.17%     
- Complexity     3166     3188      +22     
============================================
  Files           195      196       +1     
  Lines         12119    12174      +55     
  Branches        691      706      +15     
============================================
+ Hits           6683     6735      +52     
- Misses         5207     5208       +1     
- Partials        229      231       +2     

Impacted Files	Coverage Δ
...ain/java/redis/clients/jedis/json/JsonPointer.java	84.90% <84.90%> (ø)
src/main/java/redis/clients/jedis/json/Path.java	100.00% <100.00%> (ø)
src/main/java/redis/clients/jedis/json/Path2.java	73.91% <100.00%> (+5.73%)	:arrow_up:
src/main/java/redis/clients/jedis/Protocol.java	89.17% <0.00%> (+1.27%)	:arrow_up:
...nts/jedis/providers/ClusterConnectionProvider.java	81.81% <0.00%> (+3.63%)	:arrow_up:

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