feat(pinia-orm): Change orderBy execution

[CodeDredd]

🔗 Linked issue

closes #1461

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR makes some improvements to orderBy.

• orderBy is now excuted after relation ship loading so you can access nested data
• orderBy support now dot notation role.name
• it's now also possible to order by pivot data with some small help of useSotrBy

class User extends Model {
      static entity = 'users'

      @Attr() id!: number
      @Str('') name!: string
      @BelongsToMany(() => Role, () => RoleUser, 'user_id', 'role_id')
      roles!: Role[]
    }

    class Role extends Model {
      static entity = 'roles'

      @Attr() id!: number
      @BelongsToMany(() => User, () => RoleUser, 'role_id', 'user_id')
      users!: User[]

      pivot!: RoleUser
    }

    class RoleUser extends Model {
      static entity = 'roleUser'

      static primaryKey = ['role_id', 'user_id']

      @Attr() role_id!: number
      @Attr() user_id!: number
      @Attr() level!: number
    }

const users = userRepo.with('roles').orderBy((user) => {
      user.roles = useSortBy(user.roles, [['pivot.level', 'asc']])
    }).get()

// this returns

users = [
      { id: 1, name: 'James', roles: [
        { id: 2, users: [], pivot_roleUser: null, pivot: ... },
        { id: 1, users: [], pivot_roleUser: null, pivot: ... },
      ],
      },
      { id: 2, name: 'Andy', roles: [
        { id: 1, users: [], pivot_roleUser: null, pivot: ... },
      ],
      },
      { id: 3, name: 'David', roles: [] },
    ]

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.