Make global indentation available to rules

[GandaLF2006]

Summary

Rules can now read the global indentation setting from .swiftlint.yml via CurrentRule.configuration?.indentation inside their validate body.

Changes

• Moved IndentationStyle from SwiftLintFramework to SwiftLintCore so it is visible to rules without a circular module dependency.
• Add GlobalConfiguration to SwiftLintCore as the carrier for global settings exposed to rules (currently indentation).
• Add CurrentRule.configuration (task-local), populated by the linter around each rule's execution.
• Bridge Configuration → GlobalConfiguration via Configuration.globalConfiguration.

Breaking

Configuration.IndentationStyle has moved to SwiftLintCore.IndentationStyle.

Test Plan

• Added GlobalConfigurationTests covering the bridge, end-to-end delivery, and isolation between lints.

[SwiftLintBot]

	19 Messages
📖	Building this branch resulted in a binary size of 28202.66 KiB vs 28200.24 KiB when built on main (0% larger).
📖	Linting Aerial with this PR took 0.63 s vs 0.67 s on main (5% faster).
📖	Linting Alamofire with this PR took 0.91 s vs 0.91 s on main (0% slower).
📖	Linting Brave with this PR took 5.96 s vs 5.93 s on main (0% slower).
📖	Linting DuckDuckGo with this PR took 25.43 s vs 25.28 s on main (0% slower).
📖	Linting Firefox with this PR took 10.24 s vs 10.27 s on main (0% faster).
📖	Linting Kickstarter with this PR took 7.38 s vs 7.32 s on main (0% slower).
📖	Linting Moya with this PR took 0.37 s vs 0.37 s on main (0% slower).
📖	Linting NetNewsWire with this PR took 2.34 s vs 2.35 s on main (0% faster).
📖	Linting Nimble with this PR took 0.54 s vs 0.53 s on main (1% slower).
📖	Linting PocketCasts with this PR took 6.87 s vs 6.86 s on main (0% slower).
📖	Linting Quick with this PR took 0.33 s vs 0.36 s on main (8% faster).
📖	Linting Realm with this PR took 2.45 s vs 2.43 s on main (0% slower).
📖	Linting Sourcery with this PR took 1.47 s vs 1.5 s on main (2% faster).
📖	Linting Swift with this PR took 4.2 s vs 4.19 s on main (0% slower).
📖	Linting SwiftLintPerformanceTests with this PR took 0.16 s vs 0.16 s on main (0% slower).
📖	Linting VLC with this PR took 1.08 s vs 1.08 s on main (0% slower).
📖	Linting Wire with this PR took 15.05 s vs 15.05 s on main (0% slower).
📖	Linting WordPress with this PR took 9.72 s vs 9.69 s on main (0% slower).

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