Add localized hash style that returns structured data with locale-specific keys

[Copilot]

This PR implements a new "hash" style option that returns structured hash data with localized keys, addressing the feature request to provide programmatic access to time components while maintaining locale support.

What's Changed

The :hash style now returns time components as a hash with localized symbolic keys and numeric values:

# English locale (default)
timeago(Date.today.prev_day(425), style: :hash)
# => {:years=>1, :months=>4}

# Spanish locale - keys are localized
timeago(Date.today.prev_day(425), style: :hash, locale: :es)
# => {:años=>1, :meses=>4}

# French locale
timeago(Date.today.prev_day(425), style: :hash, locale: :fr)
# => {:années=>1, :mois=>4}

Key Features

• Localized Keys: Hash keys are automatically translated based on the locale setting
• Full Option Support: Works with all existing options including depth, threshold, and only
• Special Cases: Both array and hash styles now properly handle today/yesterday/tomorrow scenarios:
  • Array style: ["today"], ["yesterday"], ["tomorrow"]
  • Hash style: {días: 0} for today, {días: 1} for yesterday/tomorrow (localized)
• CLI Integration: Available via command line with --style hash option and locale support
• Backward Compatible: No changes to existing functionality
• Optimized Performance: Reuses existing methods to eliminate code duplication
• DRY Implementation: Special cases unified for both array and hash styles using shared helper methods

Examples

# Basic usage with localization
timeago('2020-1-1', '2021-3-15', style: :hash, locale: :es)
# => {:años=>1, :meses=>2}

# With depth control
timeago('2020-1-1', '2021-3-15', style: :hash, depth: 1, locale: :fr)
# => {:années=>1}

# With "only" option
timeago('2020-1-1', '2021-1-1', style: :hash, only: :months, locale: :es)
# => {:meses=>12}

# Special cases maintain localization for both styles
timeago(Date.today, style: :hash, locale: :es)
# => {:días=>0}

timeago(Date.today, style: :array, locale: :es)
# => ["hoy"]

CLI Usage

$ timeago 2020-1-1 2021-3-15 --style hash --locale es
{:años=>1, :meses=>2}

$ timeago 2020-1-1 2021-1-1 --style hash --only months --locale fr
{:mois=>12}

This enhancement enables developers to easily access individual time components for calculations, formatting, or data processing with full internationalization support, eliminating the need to parse formatted strings.

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[markets]

@copilot Not bad, but:

• I want to keep the locales working: {años: 2, semanas: 1}
• I think we can refactor (reuse) current methods, like build_time_ago_slots and build_only_slots to avoid creating a new method

[Copilot]

@copilot Not bad, but:

• I want to keep the locales working: {años: 2, semanas: 1}
• I think we can refactor (reuse) current methods, like build_time_ago_slots and build_only_slots to avoid cre...

Implemented both requested changes in commit 05a2c5b:

Localized hash keys: Hash style now returns keys in the target language:

timeago('2020-1-1', '2021-3-15', style: :hash, locale: :es)
# => {:años=>1, :meses=>2}

Refactored to reuse existing methods: Removed the duplicate build_hash_output method and modified build_time_ago_slots and build_only_slots to support both string and hash output formats. This eliminates code duplication while maintaining all functionality.

The hash style now works seamlessly with all existing options (depth, threshold, only) and provides localized keys for all supported languages.