Add support for new RPC fields

[Soheab]

Summary

discord/discord-api-docs#7674

Enum names are upped cased because name is an existing attribute.
Bots don't support any of this, just like before.

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

[Rapptz]

Make them lowercase.

The code does not care.

>>> from discord.enums import Enum
>>> class X(Enum):
...     name = 1
...
>>> X.name
<X.name: 1>

[Soheab]

Make them lowercase.

The code does not care.

>>> from discord.enums import Enum
>>> class X(Enum):
...     name = 1
...
>>> X.name
<X.name: 1>

Works. But the type checker doesn't understand it:

class Enum(discord.Enum):
    name = 0
    # Type "Literal[0]" is not assignable to declared type "DynamicClassAttribute"
    # "Literal[0]" is not assignable to "DynamicClassAttribute" Pylance reportAssignmentType

e = Enum.name
reveal_type(e) # DynamicClassAttribute
reveal_type(e.name)
# Cannot access attribute "name" for class "DynamicClassAttribute"
#  Attribute "name" is unknown Pylance reportAttributeAccessIssue
reveal_type(e.value)
# Cannot access attribute "value" for class "DynamicClassAttribute"
#  Attribute "value" is unknown Pylance reportAttributeAccessIssue

[Rapptz]

File a bug with pylance.

>>> import enum
>>> class Y(enum.Enum):
...   name = 1
...
>>> Y.name
<Y.name: 1>

[Soheab]

File a bug with pylance.

>>> import enum
>>> class Y(enum.Enum):
...   name = 1
...
>>> Y.name
<Y.name: 1>

It's apparently as designed. But i've lower-cased them.

[Rapptz]

Looks mostly okay, just fix the pre-existing nits as well.

[Rapptz]

Did we figure out how this looks from a user's POV when they try using this attribute?

[Soheab]

Still the same as before when accessing .name or .value from the member, and no response to the comment left on the Pyright repository about it.

But to be fair, it works fine when setting or comparing it:

act = discord.Activity(
    ...
    status_display_type=discord.StatusDisplayType.name,
)
print(act.status_display_type) # StatusDisplayType.name
if act.status_display_type is discord.StatusDisplayType.name:
    print("Status display type is name")