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](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

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