✨ Migrate from testify to nalgeon/be testing library

- Replace all testify/assert and testify/require with be library
- Update go.mod to use be v0.3.0 instead of testify
- Simplify test assertions using be.Equal, be.Err, and be.True
- Refactor append_test, entry_test, meta_test, log_test, and formatter tests

tools/write_buffer_test.go

@@ -7,7 +7,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/stretchr/testify/assert"
+	"github.com/nalgeon/be"
 )
 
 func TestWriteBuffer(t *testing.T) {
@@ -52,8 +52,8 @@ func getWriteTestRunner(value any, out string, err error) func(*testing.T) {
 	return func(t *testing.T) {
 		buff := &bytes.Buffer{}
 		n, er := WriteValue(buff, value)
-		assert.Equal(t, len(out), n)
-		assert.Equal(t, err, er)
-		assert.Equal(t, out, buff.String())
+		be.Equal(t, n, len(out))
+		be.Equal(t, er, err)
+		be.Equal(t, buff.String(), out)
 	}
 }