Replace .init with explicit type names

[oleksiikolomiietssnapp]

Description

Replace all .init syntax with explicit type names throughout the codebase to improve readability and maintainability.

Problem

The codebase uses .init shorthand in various places. While valid Swift syntax, this requires readers to infer the type from context, adding cognitive load during code review and maintenance.

Solution

Replace .init with explicit type constructors.

Example

self.images = .init(cache: imageCache, configuration: parserConfiguration)
self.colors = .init(cache: colorCache, configuration: parserConfiguration)
self.interactiveColors = .init(cache: interactiveColorsCache, configuration: parserConfiguration)
self.metrics = .init(cache: metricsCache, configuration: parserConfiguration)
self.fonts = .init(cache: fontsCache, configuration: parserConfiguration)

should be

self.images = SnappThemingImageDeclarations(cache: imageCache, configuration: parserConfiguration)
self.colors = SnappThemingColorDeclarations(cache: colorCache, configuration: parserConfiguration)
self.interactiveColors = SnappThemingInteractiveColorDeclarations(cache: interactiveColorsCache, configuration: parserConfiguration)
self.metrics = SnappThemingMetricDeclarations(cache: metricsCache, configuration: parserConfiguration)
self.fonts = SnappThemingFontDeclarations(cache: fontsCache, configuration: parserConfiguration)