Introduce --gen-qe-target-info and --gen-quote options for this purpose.
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

Support to retrieve quoting enclave's target information.
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

The interaction with aesmd can be shared with other aesm service messages.
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

In order to involve more aesm services, prepare to place all request
and response messages into the corresponding main sections.
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>

1. Given the signature file of an Enclave, runectl gen-token command can generate the corresponding token file from Intel aesmd service.
2. runectl attest command can allow users to challenge the enclave with the help of Intel Attestation Service through remote attestation
requests. runectl command will open soon.
Signed-off-by: NYilin Li <YiLin.Li@linux.alibaba.com>
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>