Add CT0011: prevent suppressing MA0051 (method too long)

[Copilot]

Suppressing MA0051 via #pragma warning disable MA0051 hides overly long methods instead of fixing them. CT0011 flags any such suppression and directs the developer to split the method into smaller helpers.

Changes

• PragmaWarningDisableMA0051Analyzer — new analyzer registered on PragmaWarningDirectiveTrivia; triggers only on disable (not restore) directives containing MA0051
• Resources — CT0011 title, message, and description strings added to Resources.resx / Resources.Designer.cs
• Tests — covers single disable, disable alongside other codes, restore (no trigger), unrelated warning (no trigger), and multiple occurrences

Example

// CT0011: Do not suppress MA0051. Split the method into smaller helper methods instead.
#pragma warning disable MA0051
public void Execute() { /* 60+ lines */ }
#pragma warning restore MA0051

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Prevent disabling method too long</issue_title>
<issue_description>This is always a good idea, an AI is lazy. I want another rule that says you can split the method with helper methods whenever someone writes

#pragma warning disable MA0051
```</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Prevent disabling method too long #21

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