Store error logs for each import job

[girishpanchal30]

Summary

Adds error log storing features.

Will affect visual aspect of the product

Yes

Screenshots

Test instructions

Option 1:
Activate a lower license plan and use higher plan magic tags in the import job.

Option 2:
Add the following code snippet to allow other error types:

add_filter(
	'feedzy_allowed_store_log_types',
	function ( $types ) {
		$types[] = 'debug'; // info, warn
		return $types;
	}
);

Users can disable the error storing feature by adding the following code snippet:

add_filter( 'feedzy_skip_store_error_logs', '__return_true' );

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes https://github.com/Codeinwp/feedzy-rss-feeds-pro/issues/701

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[selul]

@girishpanchal30 I think we need a way to limit this and store only the last ones, i.e let's say 200 logs. @vytisbulkevicius

[HardeepAsrani]

Looks good. We can limit the items as Marius mentioned, and maybe improve the styling a bit so it looks more readable. Also, they don't need to be red. They're not just errors.

[girishpanchal30]

@HardeepAsrani I've applied both changes.