feat(ansi): add parser pool to get/put parsers in a thread-safe manner

ansi/parser_sync.go

@@ -0,0 +1,26 @@
+package ansi
+
+import (
+	"sync"
+
+	"github.com/charmbracelet/x/ansi/parser"
+)
+
+var parserPool = sync.Pool{
+	New: func() any {
+		return NewParser(parser.MaxParamsSize, 1024*4) // 4MB data buffer
+	},
+}
+
+// GetParser returns a parser from a sync pool.
+func GetParser() *Parser {
+	return parserPool.Get().(*Parser)
+}
+
+// PutParser returns a parser to a sync pool. The parser is reset
+// automatically.
+func PutParser(p *Parser) {
+	p.Reset()
+	p.DataLen = 0
+	parserPool.Put(p)
+}