Move gitea api calls in own "client" package (#78)

continue #75
close #16
- fix regression (from #34) _thanks to @crystal_
- create own gitea client package
- more logging
- add mock impl of CertDB

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: crystal <crystal@noreply.codeberg.org>
Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/78
Reviewed-by: crapStone <crapstone@noreply.codeberg.org>

Justfile

@@ -15,6 +15,9 @@ lint: tool-golangci tool-gofumpt
     [ $(gofumpt -extra -l . | wc -l) != 0 ] && { echo 'code not formated'; exit 1; }; \
     golangci-lint run --timeout 5m
 
+fmt: tool-gofumpt
+    gofumpt -w --extra .
+
 tool-golangci:
     @hash golangci-lint> /dev/null 2>&1; if [ $? -ne 0 ]; then \
     go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest; \