feat: [+] decimal round with mode & (array) mkString functions

[eruizalo]

Description

(relatively ) new doric functions:

• Array[String] columns:
  • there is now a function called mkString like scala. Actually it is the concat_ws function from spark.
• Decimals columns:
  • there is now a round function which lets you choose the round mode given a number of decimals

Related Issue and dependencies

• Resolves N/A
• Depends on N/A

How Has This Been Tested?

• This pull request contains appropriate tests?:
  • YES

[github-actions[bot]]

:octocat: This is an auto-generated comment created by:

• Date : 2023-11-07 13:04:33 +0000 (UTC)
• Workflow : PR comment
• Job name : create_test_summary_report
• Run : 6784894058
• Commit : 9fb606e1e647d2ab9c0a18c7455e69ab1fefb61b fix: testing

Actor	Triggering actor	Sender
eruizalo	eruizalo	eruizalo
Triggered by: Workflow name: "CI" at .github/workflows/ci.yml URL: https://github.com/hablapps/doric/actions/runs/6784770726 on workflow_run:completed

Test summary report 📊

Spark version	testing
3.0.0
3.0.1
3.0.2
3.0
3.1.0
3.1.1
3.1.2
3.1
3.2.0
3.2.1
3.2.2
3.2
3.3.0
3.3.1
3.3
3.4

[codecov[bot]]

Codecov Report

Merging #354 (9fb606e) into main (6aeb249) will decrease coverage by 0.22%. The diff coverage is 70.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #354      +/-   ##
==========================================
- Coverage   97.69%   97.47%   -0.22%     
==========================================
  Files          62       62              
  Lines        1255     1264       +9     
  Branches       37       33       -4     
==========================================
+ Hits         1226     1232       +6     
- Misses         29       32       +3     

Flag	Coverage Δ
spark-3.0.x	96.48% <50.00%> (-0.24%)	:arrow_down:
spark-3.1.x	?
spark-3.2.x	97.67% <100.00%> (+0.01%)	:arrow_up:
spark-3.3.x	97.67% <100.00%> (+0.01%)	:arrow_up:
spark-3.4.x	97.67% <100.00%> (+0.01%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ore/src/main/scala/doric/syntax/ArrayColumns.scala	100.00% <100.00%> (ø)
...e/src/main/scala/doric/syntax/NumericColumns.scala	100.00% <ø> (ø)
..._3.3_3.4/scala/doric/syntax/NumericColumns32.scala	100.00% <100.00%> (ø)
....0_3.1/scala/doric/syntax/NumericColumns2_31.scala	76.92% <0.00%> (-23.08%)	:arrow_down:

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