Add support for masked fields in terminal

[alechp]

Example of what that would look like:

{
			Label:   "Setup Gitea",
			Command: "setup",
			Parameters: []gsplug.ParameterInfo{
				{Name: "username", Description: "Gitea username", Required: true},
				{Name: "password", Description: "Gitea password", Required: true, Sensitive: true}, // Added Sensitive: true
				{Name: "email", Description: "Gitea email", Required: true},
				{Name: "git_name", Description: "Name for Git commits", Required: true},
				{Name: "repo_name", Description: "Repository name", Required: true},
				{Name: "ssh_port", Description: "SSH port for Gitea (default is 22)", Required: false},
			},
		},

Relevant line:

Sensitive: true

On sdk side, would need to update this:

type MenuOption struct {
	Label      string          `json:"label"`
	Command    string          `json:"command"`
	Parameters []ParameterInfo `json:"parameters,omitempty"`
}

type ParameterInfo struct {
	Name        string `json:"name"`
	Description string `json:"description"`
	Required    bool   `json:"required"`
}

But also need to update gitspace to support processing this. Implementation on gitspace side with huh will look like this: