Add CleanupTryWithResources

[sullis]

Adds a CleanupTryWithResources recipe that removes the redundant final modifier from resources declared in a try-with-resources statement. Such resources are implicitly final (JLS 14.20.3), so the modifier adds no meaning.

// before
try (final BufferedReader reader = new BufferedReader(in)) {
}

// after
try (BufferedReader reader = new BufferedReader(in)) {
}

Notes on the implementation:

• Java-only, gated behind JavaFileChecker.
• Formatting is preserved carefully: comments living in the removed modifier's prefix are carried onto the following token, and a declaration that was wrapped around final is collapsed back onto one line. Initializers keep their own layout, so a multi-line new ...(...) is not reflowed.
• A final modifier that carries its own annotations is left alone, since dropping it would lose them.
• Leading annotations on the declaration keep their own prefix whitespace.
• The recipe is registered in META-INF/rewrite/recipes.csv; it is intentionally not added to common-static-analysis.yml.

Test coverage (CleanupTryWithResourcesTest, 12 cases):

• single resource, explicit type, and multi-line declarations
• multiple resources, including when only one of them is final
• leading annotations retained alongside the removed modifier
• comments between final and the type, between an annotation and final, and a line comment with its line break
• no-op cases: a resource without final, and a resource referencing an existing variable

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