Refactor capabilities requester

[embediver]

• Implement a correct check for cap. response flags
• Create type aliases to clarify GET_CAPABILITIES and CAPABILITIES
• Fix CAPABILITIES response handler

[github-actions]

license-eye has checked 70 files.

Valid	Invalid	Ignored	Fixed
0	56	14	0

Click to see the invalid file list

• examples/platform/cert_store.rs
• examples/platform/certs.rs
• examples/platform/crypto.rs
• examples/platform/evidence.rs
• examples/platform/mod.rs
• examples/platform/socket_transport.rs
• examples/spdm_requester.rs
• examples/spdm_responder.rs
• examples/test_static_certs.rs
• src/cert_store.rs
• src/chunk_ctx.rs
• src/codec.rs
• src/commands/algorithms/mod.rs
• src/commands/algorithms/request.rs
• src/commands/algorithms/response.rs
• src/commands/capabilities/mod.rs
• src/commands/capabilities/request.rs
• src/commands/capabilities/response.rs
• src/commands/certificate/mod.rs
• src/commands/certificate/request.rs
• src/commands/certificate/response.rs
• src/commands/challenge_auth_rsp.rs
• src/commands/chunk_get_rsp.rs
• src/commands/digests/mod.rs
• src/commands/digests/request.rs
• src/commands/digests/response.rs
• src/commands/error_rsp.rs
• src/commands/measurements_rsp.rs
• src/commands/mod.rs
• src/commands/version/mod.rs
• src/commands/version/request.rs
• src/commands/version/response.rs
• src/context.rs
• src/error.rs
• src/lib.rs
• src/measurements/common.rs
• src/measurements/freeform_manifest.rs
• src/measurements/mod.rs
• src/platform/evidence.rs
• src/platform/hash.rs
• src/platform/mod.rs
• src/platform/rng.rs
• src/platform/transport.rs
• src/protocol/algorithms.rs
• src/protocol/capabilities.rs
• src/protocol/certs.rs
• src/protocol/common.rs
• src/protocol/mod.rs
• src/protocol/signature.rs
• src/protocol/version.rs
• src/requester.rs
• src/state.rs
• src/test.rs
• src/transcript.rs
• src/transport.rs
• tests/spdm_validator_host.rs

Use this command to fix any missing license headers

```bash

docker run -it --rm -v $(pwd):/github/workspace apache/skywalking-eyes header fix

</details>

[github-actions]

Suggested change

	// Copyright 2025
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.
	// Licensed under the Apache-2.0 license

[github-actions]

Suggested change

	// Licensed under the Apache-2.0 license
	// Copyright 2025
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.
	// Licensed under the Apache-2.0 license

[github-actions]

Suggested change

	// Copyright 2025
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.
	// Licensed under the Apache-2.0 license

[embediver]

Resolves #33 .
Also fixes the tests.