feat: parse all Go CLIs with flaggy; dump bash complete.

stdlib flag dropped --hop after the query. One wrapper in internal/cli,
source <(./bin/cli/complete.go bash). Gitea #34.

internal/cli/qa.go

@@ -0,0 +1,24 @@
+package cli
+
+import "github.com/integrii/flaggy"
+
+type QAStats struct {
+	JSONL string
+}
+
+func QAParser() *flaggy.Parser {
+	c := QAStats{}
+	return BindQA(&c)
+}
+
+func BindQA(c *QAStats) *flaggy.Parser {
+	p := New("qa-stats")
+	p.Description = "DuckDB quantiles / JSONL count"
+	p.String(&c.JSONL, "", "jsonl", "JSONL file (else stdin JSON [float,…])")
+	return p
+}
+
+func ParseQAStats(args []string) (QAStats, error) {
+	var c QAStats
+	return c, Parse(BindQA(&c), args)
+}