docs: restructure article guides into per-library sections

Replaces the monolithic single-file-per-library guides with a structured documentation site organized by library. Each library now has its own section with an overview and focused sub-articles written in an article style with problem context, practical examples, and best practices.

- Add Get Started section with overview, quickstart, What's New, and Migration Guides
- Break 12 monolithic guides into 45 focused articles across 13 per-library sections
- Remove duplicate features/ folder
- Update TOC, landing page, and cross-references

Update references in docs to .NET versions

Updated docs workflow with msbuild task

Merge pull request #251 from MADE-Apps/feature/archived-port

Port of usable components from personal archived projects

Merge pull request #235 from MADE-Apps/52-feature-port-media-image-pa…

…ckage

Removed MADE.Media.Image

Merge pull request #233 from MADE-Apps/feature/fluentvalidation

Added FluentValidation support for validators

Merge pull request #232 from MADE-Apps/feature/improvements

Added new extensions and helpers across packages

Merge pull request #182 from MADE-Apps/feature/nuget

Updated package references

Merge pull request #171 from MADE-Apps/feature/assets

Updated project assets

Merge pull request #162 from MADE-Apps/feature/package-dependencies

Updated package dependencies