feat: FrankenPHP extensions (#1651)

* feat: add helpers to create PHP extensions (#1644)

* feat: add helpers to create PHP extensions

* cs

* feat: GoString

* test

* add test for RegisterExtension

* cs

* optimize includes

* fix

* feat(extensions): add the PHP extension generator (#1649)

* feat(extensions): add the PHP extension generator

* unexport many types

* unexport more symbols

* cleanup some tests

* unexport more symbols

* fix

* revert types files

* revert

* add better validation and fix templates

* remove GoStringCopy

* small fixes

---------

Co-authored-by: Kévin Dunglas <kevin@dunglas.fr>

* try to fix tests

* fix CS

* try some workarounds

* try some workarounds

* ingore TestRegisterExtension

* exclude cgo tests in Docker images

* fix

* workaround...

* race detector

* simplify tests and code

* make linter happy

* feat(gofile): use templates to generate the Go file (#1666)

---------

Co-authored-by: Alexandre Daubois <2144837+alexandre-daubois@users.noreply.github.com>

.github/workflows/docker.yaml

@@ -197,7 +197,7 @@ jobs:
         run: |
           docker run --platform=${{ matrix.platform }} --rm \
             "$(jq -r '."builder-${{ matrix.variant }}"."containerimage.config.digest"' <<< "${METADATA}")" \
-            sh -c 'go test -tags ${{ matrix.race }} -v ./... && cd caddy && go test -tags nobadger,nomysql,nopgx ${{ matrix.race }} -v ./...'
+            sh -c 'go test -tags ${{ matrix.race }} -v $(go list ./... | grep -v github.com/dunglas/frankenphp/internal/testext | grep -v github.com/dunglas/frankenphp/internal/extgen) && cd caddy && go test -tags nobadger,nomysql,nopgx ${{ matrix.race }} -v ./...'
         env:
           METADATA: ${{ steps.build.outputs.metadata }}
   # Adapted from https://docs.docker.com/build/ci/github-actions/multi-platform/