docs(emoji): misc documentation fixes for app emojis

[shiftinv]

Summary

Followup to #1224. This is a mix of different documentation clarifications.

Checklist

• If code changes were made, then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running pdm run nox -s lint
  • I have type-checked the code by running pdm run nox -s pyright
• 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, ...)

[read-the-docs-community]

Documentation build overview

📚 disnake | 🛠️ Build #29696468 | 📁 Comparing 40affc3 against latest (0306a61)

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Show files changed (48 files in total): 📝 48 modified | ➕ 0 added | ➖ 0 deleted

File	Status
index.html	📝 modified
whats_new.html	📝 modified
api/abc.html	📝 modified
api/activities.html	📝 modified
api/app_commands.html	📝 modified
api/app_info.html	📝 modified
api/audit_logs.html	📝 modified
api/automod.html	📝 modified
api/channels.html	📝 modified
api/clients.html	📝 modified
api/components.html	📝 modified
api/emoji.html	📝 modified
api/entitlements.html	📝 modified
api/events.html	📝 modified
api/exceptions.html	📝 modified
api/guild_scheduled_events.html	📝 modified
api/guilds.html	📝 modified
api/integrations.html	📝 modified
api/interactions.html	📝 modified
api/invites.html	📝 modified
api/localization.html	📝 modified
api/members.html	📝 modified
api/messages.html	📝 modified
api/misc.html	📝 modified
api/permissions.html	📝 modified
api/roles.html	📝 modified
api/skus.html	📝 modified
api/soundboard.html	📝 modified
api/stage_instances.html	📝 modified
api/stickers.html	📝 modified
api/subscriptions.html	📝 modified
api/ui.html	📝 modified
api/users.html	📝 modified
api/utilities.html	📝 modified
api/voice.html	📝 modified
api/webhooks.html	📝 modified
api/widgets.html	📝 modified
ext/tasks/index.html	📝 modified
ext/commands/api/app_commands.html	📝 modified
ext/commands/api/bots.html	📝 modified
ext/commands/api/checks.html	📝 modified
ext/commands/api/cogs.html	📝 modified
ext/commands/api/context.html	📝 modified
ext/commands/api/converters.html	📝 modified
ext/commands/api/exceptions.html	📝 modified
ext/commands/api/help_commands.html	📝 modified
ext/commands/api/misc.html	📝 modified
ext/commands/api/prefix_commands.html	📝 modified

[onerandomusername]

is_app_emoji and is_guild_emoji are now methods instead of properties

The title of this pull should reflect that. However, this seems to be two seperate issues in one pull. Please consider splitting this into two pull requests. Thank you.

[shiftinv]

The title of this pull should reflect that. However, this seems to be two seperate issues in one pull. Please consider splitting this into two pull requests. Thank you.

Sure. #1397