Fastify 4.29.0 release notes

What's Changed

fix(backport v4.x): config type in RouteShorthandOptions by @bastienmenis in https://github.com/fastify/fastify/pull/5527
feat(backport 4.x): add body parsing on copy move mkcol methods by @johaven in https://github.com/fastify/fastify/pull/5549
[Backport 4.x] fix: res serializer not given reply (#5556) by @github-actions in https://github.com/fastify/fastify/pull/5563
chore(backport 4.x): allow ! in PR title by @github-actions in https://github.com/fastify/fastify/pull/5572
[Backport 4.x] feat: support different body schema per content type by @github-actions in https://github.com/fastify/fastify/pull/5559
[Backport 4.x] chore(sponsor): add valtown by @github-actions in https://github.com/fastify/fastify/pull/5593
[Backport 4.x] fix: nullish host by @github-actions in https://github.com/fastify/fastify/pull/5594
refactor(4.x): add deprecate warning of json shorthand by @climba03003 in https://github.com/fastify/fastify/pull/5587
[Backport 4.x] chore(sponsor): add handsontable by @github-actions in https://github.com/fastify/fastify/pull/5595
[Backport 4.x] fix: throwing "FST_ERR_DUPLICATED_ROUTE" error instead of raw error by @github-actions in https://github.com/fastify/fastify/pull/5624
fix(backport 4.x): reorder handling of Response replies by @github-actions in https://github.com/fastify/fastify/pull/5629
[Backport 4.x] docs: add default value for maxParamLength by @github-actions in https://github.com/fastify/fastify/pull/5631
[Backport 4.x] chore: fix sponsor link by @github-actions in https://github.com/fastify/fastify/pull/5641
[Backport 4.x] feat: add fastify v4 codemods by @github-actions in https://github.com/fastify/fastify/pull/5654
[Backport 4.x] feat: bind this to instance in onclose by @github-actions in https://github.com/fastify/fastify/pull/5679
[Backport 4.x] docs: update v4 codemods by @github-actions in https://github.com/fastify/fastify/pull/5686

Full Changelog: https://github.com/fastify/fastify/compare/v4.28.1...v4.29.0