A few more additional fields for get_package

[BernoldNL]

Let me first introduce myself quickly. I have written my own Synology "integration" (actually a plugin for HomeSeer HS4 in C# for NAS and Router). I do a lot of reverse engineering myself and sometimes I get data from users. I also seem to end up in this repository quite often when I Google, so I thought I would share some info.

To start with, here are a few more fields for the additional parameter in get_package:
autoupdate
beta
dependent_packages
description
description_enu (seems to require description)
install_type
installed_info
is_uninstall_page
maintainer
startable
silent_upgrade
support_center

There may be more (identical to list_installed), but so far I have seen only empty strings during testing.

[N4S4]

Hello Bernold, thank you this is helpful, would you be able to make a PR?

[BernoldNL]

Sorry, I checked if I can make a PR (It's only commenting stuff anyway, no real Python code), but I have never done that before and currently don't have time (personal stuff) to figure it out. I can try in a few weeks. I can also give the lines to replace, if anyone else wants to do it.

All fields known are: ["autoupdate","beta","dependent_packages","description","description_enu","dsm_apps","install_type","is_uninstall_page","installed_info","maintainer","startable","status","silent_upgrade","support_center"].
`

which replaces current lines 62 and 63 in /synology_api/core_package.py:

All filed known are: ["status","dsm_apps"].