refactor(common): 重构 bitset 和 log 包

- 移除了 github.com/scylladb/termtables 依赖
- 修改了 bitset 包，移除了未使用的代码和测试
- 修改了 log 包，移除了未使用的代码和测试
- 更新了 go.work 文件，添加了 bitset 和 log 包

common/serialize/log/separator.go

@@ -0,0 +1,60 @@
+// Copyright 2012 Apcera Inc. All rights reserved.
+
+package termtables
+
+import "strings"
+
+type lineType int
+
+// These lines are for horizontal rules; these indicate desired styling,
+// but simplistic (pure ASCII) markup characters may end up leaving the
+// variant lines indistinguishable from LINE_INNER.
+const (
+	// LINE_INNER *must* be the default; where there are vertical lines drawn
+	// across an inner line, the character at that position should indicate
+	// that the vertical line goes both up and down from this horizontal line.
+	LINE_INNER lineType = iota
+
+	// LINE_TOP has only descenders
+	LINE_TOP
+
+	// LINE_SUBTOP has only descenders in the middle, but goes both up and
+	// down at the far left & right edges.
+	LINE_SUBTOP
+
+	// LINE_BOTTOM has only ascenders.
+	LINE_BOTTOM
+)
+
+// A Separator is a horizontal rule line, with associated information which
+// indicates where in a table it is, sufficient for simple cases to let
+// clean tables be drawn.  If a row-spanning cell is created, then this will
+// be insufficient: we can get away with hand-waving of "well, it's showing
+// where the border would be" but a more capable handling will require
+// structure reworking.  Patches welcome.
+type Separator struct {
+	where lineType
+}
+
+// Render returns the string representation of a horizontal rule line in the
+// table.
+func (s *Separator) Render(style *renderStyle) string {
+	// loop over getting dashes
+	parts := []string{}
+	for i := 0; i < style.columns; i++ {
+		w := style.PaddingLeft + style.CellWidth(i) + style.PaddingRight
+		parts = append(parts, strings.Repeat(style.BorderX, w))
+	}
+
+	switch s.where {
+	case LINE_TOP:
+		return style.BorderTopLeft + strings.Join(parts, style.BorderTop) + style.BorderTopRight
+	case LINE_SUBTOP:
+		return style.BorderLeft + strings.Join(parts, style.BorderTop) + style.BorderRight
+	case LINE_BOTTOM:
+		return style.BorderBottomLeft + strings.Join(parts, style.BorderBottom) + style.BorderBottomRight
+	case LINE_INNER:
+		return style.BorderLeft + strings.Join(parts, style.BorderI) + style.BorderRight
+	}
+	panic("not reached")
+}