[FEATURE] Stream Prioritization for HTTP2

[gimlet2]

Feature Description

Support stream prioritization using weights and dependency tree as defined in HTTP2.

Problem/Use Case

Allows clients to specify which streams are more important, optimizing resource usage and response times.

Proposed Solution

• Implement PRIORITY frames
• Support weight and dependency assignment for streams
• Make prioritization advisory but respected when possible

Code Example

server.setStreamPriority(streamId = 1, weight = 220, dependsOn = 3)

Alternatives Considered

• No prioritization; FIFO processing

Additional Context

• Would this be a breaking change? No
• Priority: Medium
• Related to #3 HTTP2 support

Related Issues/PRs

• #3 HTTP2 support