fix/session-and-misc post review issues.

[tegefaulkes]

Specification

Some issues need to be addressed after merging fix/session-and-misc

Bin command file names need to be renamed to a standard form.
For example:

commandAgentLock.ts
commandPingNode.ts

• We already categorize them by directories
• There's a common command prefix being used

Let's simplify this. For example:

.
├── agent
│   ├── commandAgentLockAll.ts
│   ├── commandAgentLock.ts
│   ├── commandAgentUnlock.ts
│   ├── commandStartAgent.ts
│   ├── commandStatusAgent.ts
│   ├── commandStopAgent.ts
│   └── index.ts

Can instead be:

.
├── agent
│   ├── lockAll.ts
│   ├── lock.ts
│   ├── unlock.ts
│   ├── start.ts
│   ├── status.ts
│   ├── stop.ts
│   └── index.ts

The sub issues in the task list also need to be completed.

Additional context

Relates to #200
Relates to #218

An MR has been created for this issue.
https://gitlab.com/MatrixAI/Engineering/Polykey/js-polykey/-/merge_requests/210

Tasks

• Wondering of src/client/ should be structured similarly to src/bin/ they both have a set of "procedures" relating to the domains.
• Standardize the naming for all bin command files: Standardize the naming of GRPC Functions/Commands and Message Types #218 (comment)
• Implementing TLS for ClientService #229
• Explore CallCredentials and SessionCredentials for GRPC #230