feat: add fields with logx methods, support using third party logging libs. (#1847)

* backup

* simplify

* chore: remove unused pool

* chore: fix lint errors

* chore: use strings.Builder instead of bytes.Buffer

* test: add more tests

* chore: fix reviewdog

* test: fix data race

* feat: make logger customizable

* chore: fix reviewdog

* test: fix fails

* chore: fix set writer twice

* chore: use context instead of golang.org context

* chore: specify uint32 for level types

core/logx/rotatelogger_test.go

@@ -120,7 +120,14 @@ func TestRotateLoggerWrite(t *testing.T) {
 			os.Remove(filepath.Base(logger.getBackupFilename()) + ".gz")
 		}()
 	}
+	// the following write calls cannot be changed to Write, because of DATA RACE.
 	logger.write([]byte(`foo`))
 	rule.rotatedTime = time.Now().Add(-time.Hour * 24).Format(dateFormat)
 	logger.write([]byte(`bar`))
+	logger.Close()
+	logger.write([]byte(`baz`))
+}
+
+func TestLogWriterClose(t *testing.T) {
+	assert.Nil(t, newLogWriter(nil).Close())
 }