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/forms/user_form_test.go

@@ -0,0 +1,64 @@
+// Copyright 2018 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package forms
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRegisterForm_IsDomainWhiteList_Empty(t *testing.T) {
+	_ = setting.Service
+
+	setting.Service.EmailDomainWhitelist = []string{}
+
+	form := RegisterForm{}
+
+	assert.True(t, form.IsEmailDomainWhitelisted())
+}
+
+func TestRegisterForm_IsDomainWhiteList_InvalidEmail(t *testing.T) {
+	_ = setting.Service
+
+	setting.Service.EmailDomainWhitelist = []string{"gitea.io"}
+
+	tt := []struct {
+		email string
+	}{
+		{"securitygieqqq"},
+		{"hdudhdd"},
+	}
+
+	for _, v := range tt {
+		form := RegisterForm{Email: v.email}
+
+		assert.False(t, form.IsEmailDomainWhitelisted())
+	}
+}
+
+func TestRegisterForm_IsDomainWhiteList_ValidEmail(t *testing.T) {
+	_ = setting.Service
+
+	setting.Service.EmailDomainWhitelist = []string{"gitea.io"}
+
+	tt := []struct {
+		email string
+		valid bool
+	}{
+		{"security@gitea.io", true},
+		{"security@gITea.io", true},
+		{"hdudhdd", false},
+		{"seee@example.com", false},
+	}
+
+	for _, v := range tt {
+		form := RegisterForm{Email: v.email}
+
+		assert.Equal(t, v.valid, form.IsEmailDomainWhitelisted())
+	}
+}