feat: add ssl config to json configuration

[josephinecr]

What does this PR do?

This PR resolves issue #156 by allowing users to define their SSL configuration directly within the nanoforge.config.json file, removing the strict need to pass --cert and --key as CLI arguments every time.

Key changes:

• Added an SslConfig block (enable, cert, key) to config.type.ts and config-defaults.ts.
• Updated the resolveSSL method in start.action.ts to read from the JSON config if the CLI arguments are missing.
• Kept CLI arguments as the priority (overriding JSON config if both are provided).
• Added proper CLIError handling with suggestions if SSL is requested but certificates/keys are missing from both the CLI args and the JSON config.

Closes #156

How do you test this PR?

1. Build the CLI (pnpm run build).
2. Go to a NanoForge project directory.
3. Add the following block to your nanoforge.config.json:

   "ssl": {
     "enable": true,
     "cert": "path/to/cert",
     "key": "path/to/key"
   }