Make ApiDefinition concept generic

[afsalthaj]

Fixes #318
Fixes #280

• Make GolemWorkerBinding common to all protocols

• Pull out common data types for an ApiDefinition into api_definition module, applicable to all protocols

• Make the current resolver generic, where given a requesst (of any protocl) , it can resolve to a GolemWorkerBinding.

• Make a new module http, which has specific data model for HttpApiDefinition, input http-request, resolver (for golem worker binding) specific to http request

• Make Validation generic

• Introduce HasGolemWorkerBinding

• Better module organisations and privacy

    * internal module within every module for adhoc functions
    * Minimise the number of public modules and functions
    * Use only pub(crate) for modules and functions that's used across the crate, and not expose it further.
    * Expose only those modules and functions in golem-worker-service that's used by golem-worker-service
  

• Avoid leak of details. ResponseMapping and how to convert etc was called from worker-service. While this is code-reuse this was never required. Given a WorkerResponse (type-annotated-value) rest of the details should be contained within golem-worker-service-base

New Modules in golem-worker-service-base (I am revisiting some of this one last time, after trying to use it from the cloud)

.
├── Cargo.toml
└── src
    ├── api
    │   ├── common.rs
    │   ├── custom_http_request_api.rs
    │   ├── error.rs
    │   ├── healthcheck.rs
    │   ├── mod.rs
    │   └── register_api_definition_api.rs
    ├── api_definition
    │   ├── api_common.rs
    │   ├── http
    │   │   ├── http_api_definition.rs
    │   │   ├── http_oas_api_definition.rs
    │   │   └── mod.rs
    │   └── mod.rs
    ├── app_config.rs
    ├── auth.rs
    ├── evaluator
    │   ├── getter.rs
    │   ├── mod.rs
    │   └── path.rs
    ├── expression
    │   ├── expr.rs
    │   └── mod.rs
    ├── http
    │   ├── http_request.rs
    │   └── mod.rs
    ├── lib.rs
    ├── merge.rs
    ├── metrics.rs
    ├── openapi_yaml.rs
    ├── parser
    │   ├── expr_parser.rs
    │   ├── literal_parser.rs
    │   ├── mod.rs
    │   ├── path_pattern_parser.rs
    │   └── place_holder_parser.rs
    ├── primitive.rs
    ├── repo
    │   ├── api_definition_repo.rs
    │   └── mod.rs
    ├── service
    │   ├── api_definition.rs
    │   ├── api_definition_lookup.rs
    │   ├── api_definition_validator.rs
    │   ├── http
    │   │   ├── http_api_definition_validator.rs
    │   │   └── mod.rs
    │   ├── mod.rs
    │   ├── template
    │   │   ├── default.rs
    │   │   ├── error.rs
    │   │   └── mod.rs
    │   └── worker
    │       ├── connect_proxy.rs
    │       ├── connect_stream.rs
    │       ├── default.rs
    │       ├── error.rs
    │       └── mod.rs
    ├── tokeniser
    │   ├── cursor.rs
    │   ├── mod.rs
    │   └── tokenizer.rs
    ├── worker_binding
    │   ├── golem_worker_binding.rs
    │   ├── mod.rs
    │   └── worker_binding_resolver.rs
    └── worker_bridge_execution
        ├── mod.rs
        ├── worker_request_executor.rs
        └── worker_response.rs

[vigoo]

Delete if not needed anymore