Refactor Hide detail module structure

[kazuk]

Issue number and link

Fixes: #177

Describe your changes

make private mod bellow

• pipeline::field::field_name
• pipeline::pump_model::window_operation_parameter::aggregate
• pipeline::pump_model::window_operation_parameter::join_parameter

Checklist before requesting a review

• I follow the Semantic Pull Requests rules (bugfix/feature)
• I specified links to related issues (must: bugfix, want: feature)
• I have performed a self-review of my code (bugfix/feature)
• I have added thorough tests (bugfix/feature)
• I have edited ## [Unreleased] section in CHANGELOG.md following keep a changelog syntax (bugfix/feature)
• I {made/will make} a related pull request for documentation repo (feature)

[codecov]

Codecov Report

Merging #178 (f76704a) into main (0bd6733) will decrease coverage by 0.16%.
The diff coverage is 82.39%.

@@            Coverage Diff             @@
##             main     #178      +/-   ##
==========================================
- Coverage   87.61%   87.45%   -0.17%     
==========================================
  Files         203      203              
  Lines       12249    12032     -217     
==========================================
- Hits        10732    10522     -210     
+ Misses       1517     1510       -7     

Impacted Files	Coverage Δ
foreign-service/src/source.rs	94.73% <ø> (ø)
...rc/source/source_input/timed_stream/file_parser.rs	0.00% <0.00%> (ø)
...vice/src/source/source_input/timed_stream/timer.rs	0.00% <0.00%> (ø)
springql-core/src/api.rs	71.87% <ø> (ø)
springql-core/src/api/error.rs	0.00% <ø> (ø)
springql-core/src/connection.rs	97.77% <ø> (ø)
springql-core/src/expression/boolean_expression.rs	100.00% <ø> (ø)
...pression/boolean_expression/comparison_function.rs	100.00% <ø> (ø)
.../expression/boolean_expression/logical_function.rs	100.00% <ø> (ø)
...xpression/boolean_expression/numerical_function.rs	100.00% <ø> (ø)
... and 177 more

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[laysakura]

@kazuk Thank you so much! Got far less complexity in visibility.

I pushed b4b4bbb in order to make recently-modified things pub.

[laysakura]

@kazuk FYI: f76704a

[laysakura]

Great work 👏
I'll soon merge this after the CI finished.