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/user/oauth.go

@@ -12,14 +12,15 @@ import (
 	"strings"
 
 	"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/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/timeutil"
+	"code.gitea.io/gitea/modules/web"
 
-	"gitea.com/macaron/binding"
+	"gitea.com/go-chi/binding"
 	"github.com/dgrijalva/jwt-go"
 )
 
@@ -192,9 +193,10 @@ func newAccessTokenResponse(grant *models.OAuth2Grant, clientSecret string) (*Ac
 }
 
 // AuthorizeOAuth manages authorize requests
-func AuthorizeOAuth(ctx *context.Context, form auth.AuthorizationForm) {
+func AuthorizeOAuth(ctx *context.Context) {
+	form := web.GetForm(ctx).(*auth.AuthorizationForm)
 	errs := binding.Errors{}
-	errs = form.Validate(ctx.Context, errs)
+	errs = form.Validate(ctx.Req, errs)
 	if len(errs) > 0 {
 		errstring := ""
 		for _, e := range errs {
@@ -341,7 +343,8 @@ func AuthorizeOAuth(ctx *context.Context, form auth.AuthorizationForm) {
 }
 
 // GrantApplicationOAuth manages the post request submitted when a user grants access to an application
-func GrantApplicationOAuth(ctx *context.Context, form auth.GrantApplicationForm) {
+func GrantApplicationOAuth(ctx *context.Context) {
+	form := web.GetForm(ctx).(*auth.GrantApplicationForm)
 	if ctx.Session.Get("client_id") != form.ClientID || ctx.Session.Get("state") != form.State ||
 		ctx.Session.Get("redirect_uri") != form.RedirectURI {
 		ctx.Error(400)
@@ -386,7 +389,8 @@ func GrantApplicationOAuth(ctx *context.Context, form auth.GrantApplicationForm)
 }
 
 // AccessTokenOAuth manages all access token requests by the client
-func AccessTokenOAuth(ctx *context.Context, form auth.AccessTokenForm) {
+func AccessTokenOAuth(ctx *context.Context) {
+	form := *web.GetForm(ctx).(*auth.AccessTokenForm)
 	if form.ClientID == "" {
 		authHeader := ctx.Req.Header.Get("Authorization")
 		authContent := strings.SplitN(authHeader, " ", 2)