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/repo/setting.go

@@ -15,9 +15,9 @@ import (
 	"time"
 
 	"code.gitea.io/gitea/models"
-	"code.gitea.io/gitea/modules/auth"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
+	auth "code.gitea.io/gitea/modules/forms"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/repository"
@@ -25,6 +25,7 @@ import (
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/validation"
+	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/routers/utils"
 	"code.gitea.io/gitea/services/mailer"
 	mirror_service "code.gitea.io/gitea/services/mirror"
@@ -59,7 +60,8 @@ func Settings(ctx *context.Context) {
 }
 
 // SettingsPost response for changes of a repository
-func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
+func SettingsPost(ctx *context.Context) {
+	form := web.GetForm(ctx).(*auth.RepoSettingForm)
 	ctx.Data["Title"] = ctx.Tr("repo.settings")
 	ctx.Data["PageIsSettingsOptions"] = true
 
@@ -839,7 +841,8 @@ func DeployKeys(ctx *context.Context) {
 }
 
 // DeployKeysPost response for adding a deploy key of a repository
-func DeployKeysPost(ctx *context.Context, form auth.AddKeyForm) {
+func DeployKeysPost(ctx *context.Context) {
+	form := web.GetForm(ctx).(*auth.AddKeyForm)
 	ctx.Data["Title"] = ctx.Tr("repo.settings.deploy_keys")
 	ctx.Data["PageIsSettingsKeys"] = true
 
@@ -956,9 +959,10 @@ func UpdateAvatarSetting(ctx *context.Context, form auth.AvatarForm) error {
 }
 
 // SettingsAvatar save new POSTed repository avatar
-func SettingsAvatar(ctx *context.Context, form auth.AvatarForm) {
+func SettingsAvatar(ctx *context.Context) {
+	form := web.GetForm(ctx).(*auth.AvatarForm)
 	form.Source = auth.AvatarLocal
-	if err := UpdateAvatarSetting(ctx, form); err != nil {
+	if err := UpdateAvatarSetting(ctx, *form); err != nil {
 		ctx.Flash.Error(err.Error())
 	} else {
 		ctx.Flash.Success(ctx.Tr("repo.settings.update_avatar_success"))