feat: Add sea theme

[ghost]

Description

Added new sea theme.

Type of change

• Updated documentation (updated the readme, templates, or other repo files)

How Has This Been Tested?

• Tested locally with a valid username
• Tested locally with an invalid username
• Ran tests with composer test
• Added or updated test cases to test new features

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Screenshots

[DenverCoder1]

Looks good, have you considered maybe making it less vibrant?

I'm thinking something less like primary blue such as #1565C0 would be look better.

Of course it is up to you, though. Let me know what you think.

[ghost]

Okay.

[ghost]

Ready.

[ghost]

I don't know why, but after I updated the branch to DenverCoder1/github-readme-streak-stats:main, the Prettier task failed in both pull requests.

[DenverCoder1]

Thanks!

Don't worry about the prettier stuff, was reworking some of it and it's not easy to make it work on PRs from forks, should be better now.

[ghost]

Okay.