feat: Add data for the path-length property (#1081)

* Add data for the path-length property

* Add new syntaxes to schema lists

Author: chrisdavidmills

css/properties.json

@@ -9245,6 +9245,22 @@
     "status": "standard",
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/paint-order"
   },
+  "path-length": {
+    "syntax": "none | <length> [0,∞]",
+    "media": "visual",
+    "inherited": false,
+    "animationType": "byComputedValue",
+    "percentages": "no",
+    "groups": [
+      "Scalable Vector Graphics"
+    ],
+    "initial": "none",
+    "appliesto": "pathCircleEllipseLinePolygonPolylineRect",
+    "computed": "noneOrAbsoluteLength",
+    "order": "uniqueOrder",
+    "status": "standard",
+    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/path-length"
+  },
   "perspective": {
     "syntax": "none | <length>",
     "media": "visual",

css/properties.schema.json

@@ -154,6 +154,7 @@
         "listEachItemIdentifierOrNoneAuto",
         "listEachItemTwoKeywordsOriginOffsets",
         "listOfNoneAutoIdentScrollOrView",
+        "noneOrAbsoluteLength",
         "noneOrImageWithAbsoluteURI",
         "noneOrOrderedListOfIdentifiers",
         "normalizedAngle",
@@ -284,6 +285,7 @@
         "nonReplacedBlockElements",
         "nonReplacedElements",
         "nonReplacedInlineElements",
+        "pathCircleEllipseLinePolygonPolylineRect",
         "positionedElements",
         "positionedElementsWithADefaultAnchorElement",
         "replacedElements",

l10n/css.json

@@ -1286,6 +1286,9 @@
     "ru": "<code>none</code> (но это значение перезаписано в дефолтном CSS браузера)",
     "zh-TW": "<code>none</code>（但此值會在使用者代理 CSS 中被覆寫）"
   },
+  "noneOrAbsoluteLength": {
+    "en-US": "The keyword <code>none</code> or an absolute length."
+  },
   "noneOrImageWithAbsoluteURI": {
     "de": "<code>none</code> oder das Bild mit absoluter URI",
     "en-US": "<code>none</code> or the image with its URI made absolute",
@@ -1410,6 +1413,9 @@
     "ja": "形式文法における値の出現順",
     "ru": "порядок появления в формальной грамматике значений"
   },
+  "pathCircleEllipseLinePolygonPolylineRect": {
+    "en-US": "The SVG {{SVGElement(\"path\")}}, {{SVGElement(\"circle\")}}, {{SVGElement(\"ellipse\")}}, {{SVGElement(\"line\")}}, {{SVGElement(\"polygon\")}}, {{SVGElement(\"polyline\")}}, and {{SVGElement(\"rect\")}} elements."
+  },
   "percentage": {
     "en-US": "percentage",
     "fr": "pourcentage"