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>

modules/translation/translation.go

@@ -9,7 +9,6 @@ import (
 	"code.gitea.io/gitea/modules/options"
 	"code.gitea.io/gitea/modules/setting"
 
-	macaron_i18n "gitea.com/macaron/i18n"
 	"github.com/unknwon/i18n"
 	"golang.org/x/text/language"
 )
@@ -20,49 +19,57 @@ type Locale interface {
 	Tr(string, ...interface{}) string
 }
 
+// LangType represents a lang type
+type LangType struct {
+	Lang, Name string
+}
+
 var (
-	matcher language.Matcher
+	matcher  language.Matcher
+	allLangs []LangType
 )
 
+// AllLangs returns all supported langauages
+func AllLangs() []LangType {
+	return allLangs
+}
+
 // InitLocales loads the locales
 func InitLocales() {
 	localeNames, err := options.Dir("locale")
-
 	if err != nil {
 		log.Fatal("Failed to list locale files: %v", err)
 	}
-	localFiles := make(map[string][]byte)
 
+	localFiles := make(map[string][]byte)
 	for _, name := range localeNames {
 		localFiles[name], err = options.Locale(name)
-
 		if err != nil {
 			log.Fatal("Failed to load %s locale file. %v", name, err)
 		}
 	}
 
 	// These codes will be used once macaron removed
-	/*tags := make([]language.Tag, len(setting.Langs))
+	tags := make([]language.Tag, len(setting.Langs))
 	for i, lang := range setting.Langs {
 		tags[i] = language.Raw.Make(lang)
 	}
-	matcher = language.NewMatcher(tags)
-	for i, name := range setting.Names {
-		i18n.SetMessage(setting.Langs[i], localFiles[name])
-	}
-	i18n.SetDefaultLang("en-US")*/
 
-	// To be compatible with macaron, we now have to use macaron i18n, once macaron
-	// removed, we can use i18n directly
-	macaron_i18n.I18n(macaron_i18n.Options{
-		SubURL:       setting.AppSubURL,
-		Files:        localFiles,
-		Langs:        setting.Langs,
-		Names:        setting.Names,
-		DefaultLang:  "en-US",
-		Redirect:     false,
-		CookieDomain: setting.SessionConfig.Domain,
-	})
+	matcher = language.NewMatcher(tags)
+	for i := range setting.Names {
+		key := "locale_" + setting.Langs[i] + ".ini"
+		if err := i18n.SetMessageWithDesc(setting.Langs[i], setting.Names[i], localFiles[key]); err != nil {
+			log.Fatal("Failed to set messages to %s: %v", setting.Langs[i], err)
+		}
+	}
+	i18n.SetDefaultLang("en-US")
+
+	allLangs = make([]LangType, 0, i18n.Count()-1)
+	langs := i18n.ListLangs()
+	names := i18n.ListLangDescs()
+	for i, v := range langs {
+		allLangs = append(allLangs, LangType{v, names[i]})
+	}
 }
 
 // Match matches accept languages