chore(core): rename Go module from code.gitea.io/gitea to MokoGitea namespace

Rename the Go module path from code.gitea.io/gitea to
git.mokoconsulting.tech/MokoConsulting/MokoGitea across the entire
codebase.

Scope:
- go.mod module declaration
- 2,235 Go source files (import paths)
- Dockerfile WORKDIR and COPY paths
- Swagger API templates
- golangci.yml linter config

External dependencies (code.gitea.io/gitea-vet, code.gitea.io/sdk/gitea,
gitea.com/gitea/act, etc.) are intentionally NOT renamed — they are
separate upstream modules.

Closes #132

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

services/gitdiff/gitdiff_test.go

@@ -10,14 +10,14 @@ import (
 	"strings"
 	"testing"
 
-	issues_model "code.gitea.io/gitea/models/issues"
-	pull_model "code.gitea.io/gitea/models/pull"
-	"code.gitea.io/gitea/models/unittest"
-	user_model "code.gitea.io/gitea/models/user"
-	"code.gitea.io/gitea/modules/git"
-	"code.gitea.io/gitea/modules/git/gitcmd"
-	"code.gitea.io/gitea/modules/json"
-	"code.gitea.io/gitea/modules/setting"
+	issues_model "git.mokoconsulting.tech/MokoConsulting/MokoGitea/models/issues"
+	pull_model "git.mokoconsulting.tech/MokoConsulting/MokoGitea/models/pull"
+	"git.mokoconsulting.tech/MokoConsulting/MokoGitea/models/unittest"
+	user_model "git.mokoconsulting.tech/MokoConsulting/MokoGitea/models/user"
+	"git.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/git"
+	"git.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/git/gitcmd"
+	"git.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/json"
+	"git.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/setting"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"