Implement HTTPBasic security

[sternakt]

Description

Type of change

• New feature (a non-breaking change that adds functionality)
• This change requires a documentation update

Checklist

• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• I have included code examples to illustrate the modifications

[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
fastagency/api/openapi/security.py	93.33%	1 Missing ⚠️

Files with missing lines	Coverage Δ
...user_guide/external_rest_apis/security_examples.py	100.00% <ø> (ø)
fastagency/api/openapi/security.py	89.92% <93.33%> (+0.41%)	⬆️