[ty] Add support for goto in literal enum member inlay hint

[MatthewMckee4]

Summary

The goal of this change was to add support for goto on the literal enum member in inlay hints, this led me to adding a new TypeDefinition. I do believe this is the right approach, but perhaps we could go for something simpler

Test Plan

ty_ide test

[MatthewMckee4]

Don't know why this formatting isn't failing on main

[astral-sh-bot]

Typing conformance results

No changes detected ✅

Current numbers

The percentage of diagnostics emitted that were expected errors held steady at 87.94%. The percentage of expected errors that received a diagnostic held steady at 83.36%. The number of fully passing files held steady at 79/133.

[astral-sh-bot]

Memory usage report

Memory usage unchanged ✅

[astral-sh-bot]

ecosystem-analyzer results

No diagnostic changes detected ✅

Full report with detailed diff (timing results)

[MichaReiser]

The PR itself looks good to me. Thanks for implementing it. Unfortunately, it does make a pre-existing issue more prominent:

from test import Color

x = Color.RED

test.py:

from enum import Enum

class Color(Enum):
    RED = 1
    BLUE = 2

Applying the inlay adds from test import Color, RED, which is incorrect.

I'm inclined to merge this PR, given that it's a pre-existing issue. However, this becomes a much more prominent problem with enums. Which is why I'd prefer if we try to fix astral-sh/ty#3313 first, if it's not too hard.

[MatthewMckee4]

I label this as invalid syntax, which would disable the edit, so we wouldn't have this issue.

edit: I see that this is not this simple, we need to test like reachability from global scope or something

[MatthewMckee4]

Ill fix in a separate PR