feat: add --format param for core checksums verification

[alaminfirdows]

Summary

This PR adds support for the --format parameter to the wp core verify-checksums command, enabling structured output formats like plain, table, json, csv, yaml, count, and others.

It brings consistency with commands like plugin verify-checksums, improving automation and scripting support.

✅ Supported formats

• plain (default)
• table
• json
• csv
• yaml
• count

🧪 Test Guide

• Run command in default format: wp core verify-checksums

• Run with JSON output: wp core verify-checksums --format=json

• Run with CSV output: wp core verify-checksums --format=csv

• Trigger an error (e.g., modify a core file) to see results in all formats.

Notes

• No breaking changes introduced.
• Falls back to default table if --format is not specified.
• Useful for CI scripts or plugin/tooling integrations.

Resolved: #94

[ernilambar]

@alaminfirdows Can you please make sure that tests are not failing? This should not be a breaking change I believe.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[alaminfirdows]

@ernilambar could you please check again?

[alaminfirdows]

@swissspidy, @thelovekesh could you please review this?

We’re working on a tool based on this, and we’re eagerly waiting for this PR to be merged. It’s going to be a real game-changer for our users!

[alaminfirdows]

@swissspidy @ernilambar I believe it’s ready for merging. I’ve completed all my parts.