Added FrequencyEnum for Reset Frequency Values

[giagara]

Changes:

Introduced a new enum FrequencyEnum in the file src/Enum/FrequencyEnum.php.
The FrequencyEnum defines the possible values for the reset_frequency column.
Added the following values in the enum:

• EVERY_SECOND = 'every second'
• EVERY_MINUTE = 'every minute'
• EVERY_HOUR = 'every hour'
• EVERY_DAY = 'every day'
• EVERY_WEEK = 'every week'
• EVERY_TWO_WEEKS = 'every two weeks'
• EVERY_MONTH = 'every month'
• EVERY_QUARTER = 'every quarter'
• EVERY_SIX_MONTHS = 'every six months'
• EVERY_YEAR = 'every year'

Benefits:

Centralized management of reset frequency values.
Simplifies handling time-based operations with the integration of Carbon date-time library.
Ensures consistency and reduces the risk of errors associated with manual time calculations.

Please review the changes and let me know if any further modifications are needed.

[nabilhassen]

Enums are not supported in PHP 8.0 and PHP 8.0 is required for Laravel 8 and 9.
Would you go further to customize for PHP 8.0 or shall I close this PR ?

[giagara]

I didn't check the compatibility, that's my fault.
The next week I can't work on it.
You can keep it open and I'll work on it ASAP.

[aneeskhan47]

@giagara @nabilhassen

This is a great package I found through Laravel Daily youtube channel. I think we can make use of php class Frequency (that what we used prior of enums introduced in php 8.1).

This would work and backward compatible too.

[nabilhassen]

hey @aneeskhan47, please feel free to submit a PR.