Stack modernization proposal: EOL dependency analysis and migration guides

[Copilot]

After analyzing the application stack, identified multiple EOL/deprecated technologies requiring migration: Laravel Mix (EOL 2023), Bootstrap 4 (EOL Jan 2023), and Laravel Legacy Factories (deprecated since Laravel 8).

Documentation Structure

Strategic Analysis

• STACK_IMPROVEMENT_PROPOSAL.md - Complete technical analysis, prioritization, risk assessment
• EXECUTIVE_SUMMARY.md - ROI analysis (200-300% first year), 4-6 week implementation timeline
• DOCUMENTATION_INDEX.md - Navigation hub for all documentation

Migration Guides (docs/migrations/)

• Laravel Mix → Vite: ~90% build time reduction (60s → 5s)
• Bootstrap 4 → 5: Breaking changes, class mappings, form component updates
• Legacy Factories → Modern: Type-safe factory migration with relationship examples

Implementation

• IMPLEMENTATION_CHECKLIST.md - Phased rollout checklist with acceptance criteria
• docs/MEJORAS_STACK.md - Quick reference for top 5 priorities

Automation

.github/dependabot.yml configured for Composer, npm, and GitHub Actions with grouped minor/patch updates.

Priority Breakdown

Critical (Phase 1, 1-2 weeks)

• Vite migration (security + performance)
• GitHub Actions syntax updates (deprecated commands)
• Legacy factory removal

High Impact (Phase 2, 2-3 weeks)

• Bootstrap 5 migration (comprehensive breaking changes)
• Class-based route syntax

Quality (Phase 3, 1 week)

• Laravel Pint integration
• Documentation finalization

Each migration guide includes troubleshooting, before/after examples, and search/replace patterns for bulk updates.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Propuesta de mejora de stack</issue_title>
<issue_description>Cuando inicialmente se elaboró la aplicación se usó un stack popular de la época. Actualmente es posible que algunas tecnologías estén despreciadas o que ya haya mejores.
Después de analizar toda la aplicación, elabora un lista de mejoras fundamentales de la aplicación.</issue_description>

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

• Fixes Propuesta de mejora de stack #65

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