feat: Add users create and list commands (#1111)

This allows for *extremely basic* user management.

coderd/database/models.go

@@ -374,13 +374,10 @@ type TemplateVersion struct {
 type User struct {
 	ID             uuid.UUID `db:"id" json:"id"`
 	Email          string    `db:"email" json:"email"`
-	Name           string    `db:"name" json:"name"`
-	Revoked        bool      `db:"revoked" json:"revoked"`
-	LoginType      LoginType `db:"login_type" json:"login_type"`
+	Username       string    `db:"username" json:"username"`
 	HashedPassword []byte    `db:"hashed_password" json:"hashed_password"`
 	CreatedAt      time.Time `db:"created_at" json:"created_at"`
 	UpdatedAt      time.Time `db:"updated_at" json:"updated_at"`
-	Username       string    `db:"username" json:"username"`
 }
 
 type Workspace struct {