[FEATURE] Specify Requirements for HTTP2 Support

[gimlet2]

Feature Description

Specify the requirements needed for HTTP2 support within the kottpd project. This includes outlining necessary features, protocol compliance, and integration points.

Problem/Use Case

The main HTTP2 support issue (#3) requires a clear definition of what "HTTP2 support" actually entails for this project. This sub-issue should help clarify expectations and provide a checklist for development and testing.

Proposed Solution

• List protocol features that must be supported (multiplexing, header compression, server push, etc.)
• Identify optional features and their value to the project
• Specify any interoperability or compatibility requirements
• Document any configuration or deployment considerations

Code Example

// Example: Placeholder for how HTTP2 might be initialized or configured
server.enableHttp2(
    enableServerPush = true,
    maxConcurrentStreams = 100
)

Alternatives Considered

• Supporting only a subset of HTTP2 features
• Using a third-party library for protocol handling

Additional Context

• Would this be a breaking change? Yes/No
• Priority: Medium
• This sub-issue is intended to provide clarity for implementation in HTTP2 support #3

Related Issues/PRs

• HTTP2 support #3 HTTP2 support