Move context from modules to services (#29440)

Since `modules/context` has to depend on `models` and many other
packages, it should be moved from `modules/context` to
`services/context` according to design principles. There is no logic
code change on this PR, only move packages.

- Move `code.gitea.io/gitea/modules/context` to
`code.gitea.io/gitea/services/context`
- Move `code.gitea.io/gitea/modules/contexttest` to
`code.gitea.io/gitea/services/contexttest` because of depending on
context
- Move `code.gitea.io/gitea/modules/upload` to
`code.gitea.io/gitea/services/context/upload` because of depending on
context

(cherry picked from commit 29f149bd9f517225a3c9f1ca3fb0a7b5325af696)

Conflicts:
	routers/api/packages/alpine/alpine.go
	routers/api/v1/repo/issue_reaction.go
	routers/install/install.go
	routers/web/admin/config.go
	routers/web/passkey.go
	routers/web/repo/search.go
	routers/web/repo/setting/default_branch.go
	routers/web/user/home.go
	routers/web/user/profile.go
	tests/integration/editor_test.go
	tests/integration/integration_test.go
	tests/integration/mirror_push_test.go
	trivial context conflicts
	also modified all other occurrences in Forgejo specific files

services/context/upload/upload_test.go

@@ -0,0 +1,194 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package upload
+
+import (
+	"bytes"
+	"compress/gzip"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUpload(t *testing.T) {
+	testContent := []byte(`This is a plain text file.`)
+	var b bytes.Buffer
+	w := gzip.NewWriter(&b)
+	w.Write(testContent)
+	w.Close()
+
+	kases := []struct {
+		data         []byte
+		fileName     string
+		allowedTypes string
+		err          error
+	}{
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "dir/test.txt",
+			allowedTypes: "",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "../../../test.txt",
+			allowedTypes: "",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: ",",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "|",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "*/*",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "*/*,",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "*/*|",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "text/plain",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "dir/test.txt",
+			allowedTypes: "text/plain",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "/dir.txt/test.js",
+			allowedTypes: ".js",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: " text/plain ",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: ".txt",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: " .txt,.js",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: " .txt|.js",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "../../test.txt",
+			allowedTypes: " .txt|.js",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: " .txt ,.js ",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "text/plain, .txt",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "text/*",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "text/*,.js",
+			err:          nil,
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "text/**",
+			err:          ErrFileTypeForbidden{"text/plain; charset=utf-8"},
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: "application/x-gzip",
+			err:          ErrFileTypeForbidden{"text/plain; charset=utf-8"},
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: ".zip",
+			err:          ErrFileTypeForbidden{"text/plain; charset=utf-8"},
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: ".zip,.txtx",
+			err:          ErrFileTypeForbidden{"text/plain; charset=utf-8"},
+		},
+		{
+			data:         testContent,
+			fileName:     "test.txt",
+			allowedTypes: ".zip|.txtx",
+			err:          ErrFileTypeForbidden{"text/plain; charset=utf-8"},
+		},
+		{
+			data:         b.Bytes(),
+			fileName:     "test.txt",
+			allowedTypes: "application/x-gzip",
+			err:          nil,
+		},
+	}
+
+	for _, kase := range kases {
+		assert.Equal(t, kase.err, Verify(kase.data, kase.fileName, kase.allowedTypes))
+	}
+}