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/api/v1/repo/pull.go

@@ -11,21 +11,22 @@ import (
 	"time"
 
 	"code.gitea.io/gitea/models"
-	"code.gitea.io/gitea/modules/auth"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/convert"
+	auth "code.gitea.io/gitea/modules/forms"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/notification"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
+	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/routers/api/v1/utils"
 	issue_service "code.gitea.io/gitea/services/issue"
 	pull_service "code.gitea.io/gitea/services/pull"
 )
 
 // ListPullRequests returns a list of all PRs
-func ListPullRequests(ctx *context.APIContext, form api.ListPullRequestsOptions) {
+func ListPullRequests(ctx *context.APIContext) {
 	// swagger:operation GET /repos/{owner}/{repo}/pulls repository repoListPullRequests
 	// ---
 	// summary: List a repo's pull requests
@@ -253,7 +254,7 @@ func DownloadPullDiffOrPatch(ctx *context.APIContext, patch bool) {
 }
 
 // CreatePullRequest does what it says
-func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption) {
+func CreatePullRequest(ctx *context.APIContext) {
 	// swagger:operation POST /repos/{owner}/{repo}/pulls repository repoCreatePullRequest
 	// ---
 	// summary: Create a pull request
@@ -284,6 +285,7 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
+	form := *web.GetForm(ctx).(*api.CreatePullRequestOption)
 	if form.Head == form.Base {
 		ctx.Error(http.StatusUnprocessableEntity, "BaseHeadSame",
 			"Invalid PullRequest: There are no changes between the head and the base")
@@ -437,7 +439,7 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 }
 
 // EditPullRequest does what it says
-func EditPullRequest(ctx *context.APIContext, form api.EditPullRequestOption) {
+func EditPullRequest(ctx *context.APIContext) {
 	// swagger:operation PATCH /repos/{owner}/{repo}/pulls/{index} repository repoEditPullRequest
 	// ---
 	// summary: Update a pull request. If using deadline only the date will be taken into account, and time of day ignored.
@@ -478,6 +480,7 @@ func EditPullRequest(ctx *context.APIContext, form api.EditPullRequestOption) {
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
+	form := web.GetForm(ctx).(*api.EditPullRequestOption)
 	pr, err := models.GetPullRequestByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
 	if err != nil {
 		if models.IsErrPullRequestNotExist(err) {
@@ -685,7 +688,7 @@ func IsPullRequestMerged(ctx *context.APIContext) {
 }
 
 // MergePullRequest merges a PR given an index
-func MergePullRequest(ctx *context.APIContext, form auth.MergePullRequestForm) {
+func MergePullRequest(ctx *context.APIContext) {
 	// swagger:operation POST /repos/{owner}/{repo}/pulls/{index}/merge repository repoMergePullRequest
 	// ---
 	// summary: Merge a pull request
@@ -720,6 +723,7 @@ func MergePullRequest(ctx *context.APIContext, form auth.MergePullRequestForm) {
 	//   "409":
 	//     "$ref": "#/responses/error"
 
+	form := web.GetForm(ctx).(*auth.MergePullRequestForm)
 	pr, err := models.GetPullRequestByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
 	if err != nil {
 		if models.IsErrPullRequestNotExist(err) {