feat(ApplicationFlags): add new flags

[almeidx]

Please describe the changes this PR makes and why it should be merged:

Reference Discord API Docs PRs or commits:

• Document Embedded Released and Embedded First Party application flags discord/discord-api-docs#4248

[almeidx]

I noticed there were a few flags in the enums that are not documented on Discord's side, but I chose to not remove them as to not make this a breaking pull request

Should those be removed (perhaps in a separate pull request)?

[kyranet]

I personally would either remove or deprecate them (as undocumented). cc @vladfrangu

[vladfrangu]

They're staying, as they're present in the dev portal's source (and are one of those "well maybe you need them but they're not considered important to bots for Discord")

[kyranet]

Thank you for your contribution, however, the upstream PR has been closed as Discord does not want to document those flags.

[vladfrangu]

Could you restore the branch when you have time? I want this merged since there's direct relations to one of these flags in a separate interface (specifically APIInvite)

[almeidx]

It doesn't let me open this pull request again

Here's a new one:

• feat(ApplicationFlags): add embedded application flags #277