feat: add HTTP server mode with updated docs and localization (#45)

- Update download instructions for clarity and consistency in all README files
- Add example configuration for HTTP mode to all README files
- Expand transport type support to include "http" in command-line flags and documentation
- Implement HTTP server mode in the application entrypoint
- Update log output behavior to include "http" mode alongside "sse" for stdout logging
- Refine Chinese README translations for greater accuracy and localization

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Reviewed-on: https://gitea.com/gitea/gitea-mcp/pulls/45
Co-authored-by: appleboy <appleboy.tw@gmail.com>
Co-committed-by: appleboy <appleboy.tw@gmail.com>

pkg/log/log.go

@@ -39,7 +39,7 @@ func Default() *zap.Logger {
 				MaxAge:     30,
 			}))
 
-			if flag.Mode == "sse" {
+			if flag.Mode == "http" || flag.Mode == "sse" {
 				wss = append(wss, zapcore.AddSync(os.Stdout))
 			}