Generated the JSON contracts of providers, the runtime, and services at compile time (#1150)

app/Tests/Serialization/Fixtures/chat-completion-request.json

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+{"model":"chat-model","messages":[{"content":"You answer briefly.","role":"system"},{"content":[{"type":"text","text":"What do the pictures show?"},{"type":"image_url","image_url":{"url":"data:image/png;base64,iVBORw0KGgo="}},{"type":"image_url","image_url":"https://example.org/picture.png"}],"role":"user"},{"role":"assistant","content":null,"reasoning_content":"The weather needs a search.","tool_calls":[{"id":"call_1","type":"function","function":{"name":"web_search","arguments":"{\u0022query\u0022:\u0022weather\u0022}"},"index":0}]},{"role":"tool","content":"It is sunny.","tool_call_id":"call_1"}],"stream":true,"tools":[{"type":"function","function":{"name":"web_search","description":"Search the web.","parameters":{"type":"object","properties":{"query":{"type":"string","description":"The search query."},"page":{"type":["integer","null"],"description":"The page, starting at 1."}},"required":["query","page"],"additionalProperties":false},"strict":true}}],"parallel_tool_calls":false,"stream_options":{"include_usage":true},"temperature":0.5,"top_k":40,"seed":12345678901,"stop":["END",7],"reasoning":{"effort":"low","summary":""},"logprobs":false}