Move macaron to chi (#14293)

Use [chi](https://github.com/go-chi/chi) instead of the forked [macaron](https://gitea.com/macaron/macaron). Since macaron and chi have conflicts with session share, this big PR becomes a have-to thing. According my previous idea, we can replace macaron step by step but I'm wrong. :( Below is a list of big changes on this PR.

- [x] Define `context.ResponseWriter` interface with an implementation `context.Response`.
- [x] Use chi instead of macaron, and also a customize `Route` to wrap chi so that the router usage is similar as before.
- [x] Create different routers for `web`, `api`, `internal` and `install` so that the codes will be more clear and no magic .
- [x] Use https://github.com/unrolled/render instead of macaron's internal render
- [x] Use https://github.com/NYTimes/gziphandler instead of https://gitea.com/macaron/gzip
- [x] Use https://gitea.com/go-chi/session which is a modified version of https://gitea.com/macaron/session and removed `nodb` support since it will not be maintained. **BREAK**
- [x] Use https://gitea.com/go-chi/captcha which is a modified version of https://gitea.com/macaron/captcha
- [x] Use https://gitea.com/go-chi/cache which is a modified version of https://gitea.com/macaron/cache
- [x] Use https://gitea.com/go-chi/binding which is a modified version of https://gitea.com/macaron/binding
- [x] Use https://github.com/go-chi/cors instead of https://gitea.com/macaron/cors
- [x] Dropped https://gitea.com/macaron/i18n and make a new one in `code.gitea.io/gitea/modules/translation`
- [x] Move validation form structs from `code.gitea.io/gitea/modules/auth` to `code.gitea.io/gitea/modules/forms` to avoid dependency cycle.
- [x] Removed macaron log service because it's not need any more. **BREAK**
- [x] All form structs have to be get by `web.GetForm(ctx)` in the route function but not as a function parameter on routes definition.
- [x] Move Git HTTP protocol implementation to use routers directly.
- [x] Fix the problem that chi routes don't support trailing slash but macaron did.
- [x] `/api/v1/swagger` now will be redirect to `/api/swagger` but not render directly so that `APIContext` will not create a html render. 

Notices:
- Chi router don't support request with trailing slash
- Integration test `TestUserHeatmap` maybe mysql version related. It's failed on my macOS(mysql 5.7.29 installed via brew) but succeed on CI.

Co-authored-by: 6543 <6543@obermui.de>

routers/private/key.go

@@ -9,13 +9,12 @@ import (
 	"net/http"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/timeutil"
-
-	"gitea.com/macaron/macaron"
 )
 
 // UpdatePublicKeyInRepo update public key and deploy key updates
-func UpdatePublicKeyInRepo(ctx *macaron.Context) {
+func UpdatePublicKeyInRepo(ctx *context.PrivateContext) {
 	keyID := ctx.ParamsInt64(":id")
 	repoID := ctx.ParamsInt64(":repoid")
 	if err := models.UpdatePublicKeyUpdated(keyID); err != nil {
@@ -49,7 +48,7 @@ func UpdatePublicKeyInRepo(ctx *macaron.Context) {
 
 // AuthorizedPublicKeyByContent searches content as prefix (leak e-mail part)
 // and returns public key found.
-func AuthorizedPublicKeyByContent(ctx *macaron.Context) {
+func AuthorizedPublicKeyByContent(ctx *context.PrivateContext) {
 	content := ctx.Query("content")
 
 	publicKey, err := models.SearchPublicKeyByContent(content)