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/branch.go

@@ -16,6 +16,7 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	repo_module "code.gitea.io/gitea/modules/repository"
 	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/web"
 	pull_service "code.gitea.io/gitea/services/pull"
 	repo_service "code.gitea.io/gitea/services/repository"
 )
@@ -175,7 +176,7 @@ func DeleteBranch(ctx *context.APIContext) {
 }
 
 // CreateBranch creates a branch for a user's repository
-func CreateBranch(ctx *context.APIContext, opt api.CreateBranchRepoOption) {
+func CreateBranch(ctx *context.APIContext) {
 	// swagger:operation POST /repos/{owner}/{repo}/branches repository repoCreateBranch
 	// ---
 	// summary: Create a branch
@@ -206,6 +207,7 @@ func CreateBranch(ctx *context.APIContext, opt api.CreateBranchRepoOption) {
 	//   "409":
 	//     description: The branch with the same name already exists.
 
+	opt := web.GetForm(ctx).(*api.CreateBranchRepoOption)
 	if ctx.Repo.Repository.IsEmpty {
 		ctx.Error(http.StatusNotFound, "", "Git Repository is empty.")
 		return
@@ -395,7 +397,7 @@ func ListBranchProtections(ctx *context.APIContext) {
 }
 
 // CreateBranchProtection creates a branch protection for a repo
-func CreateBranchProtection(ctx *context.APIContext, form api.CreateBranchProtectionOption) {
+func CreateBranchProtection(ctx *context.APIContext) {
 	// swagger:operation POST /repos/{owner}/{repo}/branch_protections repository repoCreateBranchProtection
 	// ---
 	// summary: Create a branch protections for a repository
@@ -428,6 +430,7 @@ func CreateBranchProtection(ctx *context.APIContext, form api.CreateBranchProtec
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
+	form := web.GetForm(ctx).(*api.CreateBranchProtectionOption)
 	repo := ctx.Repo.Repository
 
 	// Currently protection must match an actual branch
@@ -561,7 +564,7 @@ func CreateBranchProtection(ctx *context.APIContext, form api.CreateBranchProtec
 }
 
 // EditBranchProtection edits a branch protection for a repo
-func EditBranchProtection(ctx *context.APIContext, form api.EditBranchProtectionOption) {
+func EditBranchProtection(ctx *context.APIContext) {
 	// swagger:operation PATCH /repos/{owner}/{repo}/branch_protections/{name} repository repoEditBranchProtection
 	// ---
 	// summary: Edit a branch protections for a repository. Only fields that are set will be changed
@@ -596,7 +599,7 @@ func EditBranchProtection(ctx *context.APIContext, form api.EditBranchProtection
 	//     "$ref": "#/responses/notFound"
 	//   "422":
 	//     "$ref": "#/responses/validationError"
-
+	form := web.GetForm(ctx).(*api.EditBranchProtectionOption)
 	repo := ctx.Repo.Repository
 	bpName := ctx.Params(":name")
 	protectBranch, err := models.GetProtectedBranchBy(repo.ID, bpName)