Introduce transformation schemas

[snuyanzin]

The PR introduces schemas for transformations mentioned at #429
Also it introduce a new SQL transformer

an example of usage

Faker faker = new Faker();
      System.out.println(
        new SqlTransformer.SqlTransformerBuilder()
            .build()
            .generate(
                faker.collection(faker::name).len(5).generate(),
                Schema.of(field("name", Name::fullName), field("username", Name::username))));

which results to

insert into "MyTable" ("name", "username") values ('Joel Adams', 'darren.wiza');
insert into "MyTable" ("name", "username") values ('Cameron Runolfsdottir', 'kayla.robel');
insert into "MyTable" ("name", "username") values ('Justin Ernser', 'michel.anderson');
insert into "MyTable" ("name", "username") values ('Mauro Pouros', 'jesus.schulist');
insert into "MyTable" ("name", "username") values ('Annie Cormier Jr.', 'roseline.vonrueden');

[codecov-commenter]

Codecov Report

Merging #430 (74705a2) into main (3d8a959) will decrease coverage by 1.72%.
The diff coverage is 63.63%.

@@             Coverage Diff              @@
##               main     #430      +/-   ##
============================================
- Coverage     93.95%   92.23%   -1.73%     
- Complexity     2006     2060      +54     
============================================
  Files           222      228       +6     
  Lines          4021     4263     +242     
  Branches        384      431      +47     
============================================
+ Hits           3778     3932     +154     
- Misses          146      225      +79     
- Partials         97      106       +9     

Impacted Files	Coverage Δ
.../net/datafaker/transformations/SqlTransformer.java	0.00% <0.00%> (ø)
...ain/java/net/datafaker/transformations/Schema.java	41.66% <41.66%> (ø)
...ava/net/datafaker/transformations/SimpleField.java	77.77% <77.77%> (ø)
.../net/datafaker/transformations/CompositeField.java	80.00% <80.00%> (ø)
...net/datafaker/transformations/JsonTransformer.java	88.04% <88.04%> (ø)
.../net/datafaker/transformations/CsvTransformer.java	92.59% <92.59%> (ø)

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