feat: implement rate limiting

[cameri]

Description

1. Add Redis
2. Implement NIP-20 Command Results
3. Implement sliding window rate limiter
4. Rate limit WebSocket messages by IP
5. Rate limit Nostr Events by pubkey
6. Add rate limiting to settings
7. Update documentation to include redis and rate limiting

Related Issue

#7
#40

Motivation and Context

1. Avoid the Tragedy of the Commons, where uncoordinated individuals acting on their own self-interest, cause depletion of a shared resource

How Has This Been Tested?

1. Unit tests
2. Integration tests (except rate-limiting)

Screenshots (if appropriate):

Types of changes

• Non-functional change (docs, style, minor refactor)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my code changes.
• All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 3453372650

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.667%

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Totals
Change from base Build 3452290770:	0.0%
Covered Lines:	724
Relevant Lines:	807

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💛 - Coveralls

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
7.7% Duplication

[github-actions]

🎉 This PR is included in version 1.8.0 🎉

The release is available on GitHub release

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