Java: Adding command LCS (No IDX option)

[tjzhang-BQ]

• Java: Adding command LCS (default & LEN option)

Issue #, if available:

Description of changes:
This only covers the signature where LCS returns the LCS as a String and LCS length as a Long. Map return type with the IDX option is coming as a part II

MINMATCHLEN does not seem to work:

127.0.0.1:6379> set a1 abc
OK
127.0.0.1:6379> set a2 bcd
OK
127.0.0.1:6379> lcs a1 a2
"bc"
127.0.0.1:6379> lcs a1 a2 len
(integer) 2
127.0.0.1:6379> lcs a1 a2 MINMATCHLEN 3
"bc"
127.0.0.1:6379> lcs a1 a2 len MINMATCHLEN 3
(integer) 2
127.0.0.1:6379> lcs a1 a2 idx MINMATCHLEN 3
1) "matches"
2) (empty array)
3) "len"
4) (integer) 2

And as a reference valkey-io/valkey#420 discusses how WITHMATCHLEN and MINMATCHLEN only works/makes sense with the IDX option but is still allowed to be added when IDX isn't present.

For now, this PR will only include the default behavior without optional keywords and the LEN option behavior, which is mutually exclusive with IDX, without the MINMATCHLEN option

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[shohamazon]

the best way rn is to add this option only when IDX is passed

[acarbonetto]

is it not easier to just include: client.mset({"testKey1", "testKey2"}, {"abcd", "axcd"}).get();