feat: Allow config to set default scale.zero per marktype (vega#8354)

* Add examples

* chore: update examples [CI]

* Add config.scale.zero

* chore: update examples [CI]

* update doc

* Minor refactor:
- Undo encodingHasRangeChannels
- Set `true` for continuous size scale regardless to config
- Fix doc

* Update the doc and fix the typo

Co-authored-by: GitHub Actions Bot <vega-actions-bot@users.noreply.github.com>

build/vega-lite-schema.json

@@ -21632,6 +21632,10 @@
             }
           ],
           "description": "Reverse x-scale by default (useful for right-to-left charts)."
+        },
+        "zero": {
+          "description": "Default `scale.zero` for [`continuous`](https://vega.github.io/vega-lite/docs/scale.html#continuous) scales except for (1) x/y-scales of non-ranged bar or area charts and (2) size scales.\n\n__Default value:__ `true`",
+          "type": "boolean"
         }
       },
       "type": "object"

examples/compiled/bar_config_no_zero.vg.json

@@ -0,0 +1,122 @@
+{
+  "$schema": "https://vega.github.io/schema/vega/v5.json",
+  "description": "A simple bar chart with embedded data.",
+  "background": "white",
+  "padding": 5,
+  "height": 200,
+  "style": "cell",
+  "data": [
+    {
+      "name": "source_0",
+      "values": [
+        {"a": "A", "b": 28},
+        {"a": "B", "b": 55},
+        {"a": "C", "b": 43},
+        {"a": "D", "b": 91},
+        {"a": "E", "b": 81},
+        {"a": "F", "b": 53},
+        {"a": "G", "b": 19},
+        {"a": "H", "b": 87},
+        {"a": "I", "b": 52}
+      ]
+    },
+    {
+      "name": "data_0",
+      "source": "source_0",
+      "transform": [
+        {
+          "type": "stack",
+          "groupby": ["a"],
+          "field": "b",
+          "sort": {"field": [], "order": []},
+          "as": ["b_start", "b_end"],
+          "offset": "zero"
+        },
+        {
+          "type": "filter",
+          "expr": "isValid(datum[\"b\"]) && isFinite(+datum[\"b\"])"
+        }
+      ]
+    }
+  ],
+  "signals": [
+    {"name": "x_step", "value": 20},
+    {
+      "name": "width",
+      "update": "bandspace(domain('x').length, 0.1, 0.05) * x_step"
+    }
+  ],
+  "marks": [
+    {
+      "name": "marks",
+      "type": "rect",
+      "style": ["bar"],
+      "from": {"data": "data_0"},
+      "encode": {
+        "update": {
+          "fill": {"value": "#4c78a8"},
+          "ariaRoleDescription": {"value": "bar"},
+          "description": {
+            "signal": "\"a: \" + (isValid(datum[\"a\"]) ? datum[\"a\"] : \"\"+datum[\"a\"]) + \"; b: \" + (format(datum[\"b\"], \"\"))"
+          },
+          "x": {"scale": "x", "field": "a"},
+          "width": {"signal": "max(0.25, bandwidth('x'))"},
+          "y": {"scale": "y", "field": "b_end"},
+          "y2": {"scale": "y", "field": "b_start"}
+        }
+      }
+    }
+  ],
+  "scales": [
+    {
+      "name": "x",
+      "type": "band",
+      "domain": {"data": "data_0", "field": "a", "sort": true},
+      "range": {"step": {"signal": "x_step"}},
+      "paddingInner": 0.1,
+      "paddingOuter": 0.05
+    },
+    {
+      "name": "y",
+      "type": "linear",
+      "domain": {"data": "data_0", "fields": ["b_start", "b_end"]},
+      "range": [{"signal": "height"}, 0],
+      "nice": true,
+      "zero": true
+    }
+  ],
+  "axes": [
+    {
+      "scale": "y",
+      "orient": "left",
+      "gridScale": "x",
+      "grid": true,
+      "tickCount": {"signal": "ceil(height/40)"},
+      "domain": false,
+      "labels": false,
+      "aria": false,
+      "maxExtent": 0,
+      "minExtent": 0,
+      "ticks": false,
+      "zindex": 0
+    },
+    {
+      "scale": "x",
+      "orient": "bottom",
+      "grid": false,
+      "title": "a",
+      "labelAngle": 0,
+      "labelBaseline": "top",
+      "zindex": 0
+    },
+    {
+      "scale": "y",
+      "orient": "left",
+      "grid": false,
+      "title": "b",
+      "labelOverlap": true,
+      "tickCount": {"signal": "ceil(height/40)"},
+      "zindex": 0
+    }
+  ]
+}