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/install.go

@@ -11,18 +11,23 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
+	"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/generate"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/middlewares"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/user"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/modules/web"
 
+	"gitea.com/go-chi/session"
 	"gopkg.in/ini.v1"
 )
 
@@ -33,17 +38,39 @@ const (
 )
 
 // InstallInit prepare for rendering installation page
-func InstallInit(ctx *context.Context) {
-	if setting.InstallLock {
-		ctx.Header().Add("Refresh", "1; url="+setting.AppURL+"user/login")
-		ctx.HTML(200, tplPostInstall)
-		return
-	}
+func InstallInit(next http.Handler) http.Handler {
+	var rnd = templates.HTMLRenderer()
 
-	ctx.Data["Title"] = ctx.Tr("install.install")
-	ctx.Data["PageIsInstall"] = true
-
-	ctx.Data["DbOptions"] = setting.SupportedDatabases
+	return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
+		if setting.InstallLock {
+			resp.Header().Add("Refresh", "1; url="+setting.AppURL+"user/login")
+			_ = rnd.HTML(resp, 200, string(tplPostInstall), nil)
+			return
+		}
+		var locale = middlewares.Locale(resp, req)
+		var startTime = time.Now()
+		var ctx = context.Context{
+			Resp:    context.NewResponse(resp),
+			Flash:   &middlewares.Flash{},
+			Locale:  locale,
+			Render:  rnd,
+			Session: session.GetSession(req),
+			Data: map[string]interface{}{
+				"Title":         locale.Tr("install.install"),
+				"PageIsInstall": true,
+				"DbOptions":     setting.SupportedDatabases,
+				"i18n":          locale,
+				"Language":      locale.Language(),
+				"CurrentURL":    setting.AppSubURL + req.URL.RequestURI(),
+				"PageStartTime": startTime,
+				"TmplLoadTimes": func() string {
+					return time.Since(startTime).String()
+				},
+			},
+		}
+		ctx.Req = context.WithContext(req, &ctx)
+		next.ServeHTTP(resp, ctx.Req)
+	})
 }
 
 // Install render installation page
@@ -116,12 +143,13 @@ func Install(ctx *context.Context) {
 	form.DefaultEnableTimetracking = setting.Service.DefaultEnableTimetracking
 	form.NoReplyAddress = setting.Service.NoReplyAddress
 
-	auth.AssignForm(form, ctx.Data)
+	middlewares.AssignForm(form, ctx.Data)
 	ctx.HTML(200, tplInstall)
 }
 
 // InstallPost response for submit install items
-func InstallPost(ctx *context.Context, form auth.InstallForm) {
+func InstallPost(ctx *context.Context) {
+	form := *web.GetForm(ctx).(*auth.InstallForm)
 	var err error
 	ctx.Data["CurDbOption"] = form.DbType