feat: Improve rule_provider

[noctiro]

🤔 This is a ...

• New feature
• Bug fix
• Performance optimization
• Enhancement feature
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

💡 Background and solution

This pull request enhances the rule_provider configuration in accordance with the Mihomo specification (Chinese version).

Background:

The previous implementation required users to manually specify path and interval, and did not support the new mrs format.

Solution:

• Added support for the format field, including the mrs format.
• The path field is now optional. If omitted, it defaults to rules/xxx with the filename generated via MD5 hash of the source URL.
• The interval field is also now optional and defaults to 0 if not specified.

These improvements simplify configuration and enhance compatibility with Mihomo.

📝 Changelog

• Support for mrs format added in rule_provider.
• path field is now optional and auto-generated via MD5 if missing.
• interval field is now optional, defaulting to 0.

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Changelog is provided or not needed

[codecov]

Codecov Report

Attention: Patch coverage is 6.92308% with 363 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...ote_content_manager/providers/rule_provider/mrs.rs	0.00%	238 Missing ⚠️
...ontent_manager/providers/rule_provider/provider.rs	0.00%	75 Missing ⚠️
...h_lib/src/config/internal/convert/rule_provider.rs	0.00%	22 Missing ⚠️
clash_lib/src/common/succinct_set.rs	61.36%	16 Missing and 1 partial ⚠️
clash_lib/src/app/router/mod.rs	0.00%	6 Missing ⚠️
clash_lib/src/common/utils.rs	0.00%	5 Missing ⚠️

📢 Thoughts on this report? Let us know!

[ibigbug]

Thanks!