fix(docs): support for zero behaviour [skip ci]

source/app/metrics/metadata.mjs

@@ -328,7 +328,7 @@ metadata.plugin = async function({__plugins, __templates, name, logger}) {
           if (o.global)
             cell.push("⏭️ Global option<br>")
           if (o.testing)
-            cell.push("🔧 For development")
+            cell.push("🔧 For development<br>")
           if (!Object.keys(previous?.inputs ?? {}).includes(option))
             cell.push("✨ On <code>master</code>/<code>main</code><br>")
           if (o.extras)
@@ -336,13 +336,15 @@ metadata.plugin = async function({__plugins, __templates, name, logger}) {
           cell.push(`<b>type:</b> <code>${type}</code>`)
           if ("format" in o)
             cell.push(`<i>(${Array.isArray(o.format) ? o.format[0] : o.format})</i>`)
-          cell.push("<br>")
           if ("min" in o)
             cell.push(`<i>(${o.min} ≤`)
           if (("min" in o)||("max" in o))
             cell.push(`${"min" in o ? "" : "<i>("}𝑥${"max" in o ? "" : ")</i>"}`)
           if ("max" in o)
             cell.push(`≤ ${o.max})</i>`)
+          cell.push("<br>")
+          if ("zero" in o)
+            cell.push(`<b>zero behaviour:</b> ${o.zero}</br>`)
           if (("default" in o)&&(o.default !== "")) {
             let text = o.default
             if (o.default === ".user.login")