Add Link header pagination helpers (#100)

* Add Link header pagination helpers

Adds PageInfo (parses RFC 5988 Link headers into next/prev/first/last
URLs) and PaginatedResponse<T> structs, plus loadPaginated() on Router
with callback and async/await variants. Enables callers to detect and
navigate multi-page API responses without manual Link header parsing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Apply swiftformat formatting

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Add Pagination.swift and PaginationTests.swift to Xcode project

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Merge pull request #97 from 417-72KI/only-decodable

Make type for `load/post` just `Decodable`

Merge pull request #90 from 417-72KI/async-await-void

`async/await` Void function

Merge pull request #87 from nerdishbynature/dependabot/bundler/nokogi…

…ri-1.13.6

Bump nokogiri from 1.13.4 to 1.13.6

Merge pull request #78 from nerdishbynature/enable-macos

Enable async/await on macOS

Fix pod validation errors

Merge pull request #65 from nerdishbynature/dependabot/bundler/rubyzi…

…p-1.3.0

Bump rubyzip from 1.2.1 to 1.3.0

Bump version

Merge pull request #47 from mpvosseller/prepare-2.2.0

WIP Prepare for version to 2.2.0

Merge pull request #37 from nerdishbynature/swift-4

Swift 4