Feat: Add server timezone dropdown

[peaklabs-dev]

Fixes: https://github.com/coollabsio/coolify/issues/3036

Note:

• Only the server timezone setting is reflected on the server (/etc/localtime and /etc/timezone), the instance timezone is only for updates. This is fine right?

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• Fixes #3036: Color of Recent Executions in light mode is wrong, the recent executions are not visible.

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• Feat: Redesign Recent Executions (cron jobs for services and applications):

• Feat: Redesign of Recent Backup Executions:

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• Feat: Ability to set the timezone of each server, so cron jobs are executed at the right time (if you set it to every day at 12, they are executed when it is 12 for your set timezone, not some random server time (default UCT))
• Fix: Backup and cron jobs are executing seemingly at the wrong time (wrong timezone)
• Feat: Add server timezone setting:

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• Feat: Add Instance timezone for auto update and update check
• Feat: Instance timezone setting:

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• Feat: Recent executions uses server timezone as well:

• Feat: Recent backups uses server timezone as well:

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• Feat: Recent executions uses server timezone as well.
• Feat: The timezone selector has inbuilt search and is responsive to light and dark mode :)
• Added DB migration
• Added default server timezone seeder (so the timezone on the actual server /etc/timezone is also updated)
• (Autoformatting doubled my modified lines)