feat: refactor API comparison structures

- Add a new `swaggerCompare` struct for API response in `repo.go`
- Update the `basePath` in `v1_json.tmpl` to include `AppSubUrl`
- Define a new `Compare` object in Swagger JSON template with properties `commits` and `total_commits`
- Add a reference to the `Compare` definition in Swagger JSON template

Signed-off-by: Bo-Yi Wu <[email protected]>

Author: appleboy

routers/api/v1/swagger/repo.go

@@ -414,3 +414,9 @@ type swaggerRepoNewIssuePinsAllowed struct {
 	// in:body
 	Body api.NewIssuePinsAllowed `json:"body"`
 }
+
+// swagger:response Compare
+type swaggerCompare struct {
+	// in:body
+	Body api.Compare `json:"body"`
+}