feat: improve error messages for annotation issues in command parameters

[onerandomusername]

Reduce the length of the traceback and provide a helpful error message
when a user forgets to import a type used in a command parameter annotation
outside of a TYPE_CHECKING block.

[read-the-docs-community]

Documentation build overview

📚 disnake | 🛠️ Build #29991028 | 📁 Comparing 17a2f65 against latest (a26c681)

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

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index.html	📝 modified
whats_new.html	📝 modified
api/abc.html	📝 modified
api/activities.html	📝 modified
api/app_commands.html	📝 modified
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ext/commands/api/prefix_commands.html	📝 modified