feat(altair): implement bar-basic

Author: github-actions[bot]

plots/bar-basic/implementations/altair.py

@@ -0,0 +1,39 @@
+"""
+bar-basic: Basic Bar Chart
+Library: altair
+"""
+
+import altair as alt
+import pandas as pd
+
+
+# Data
+data = pd.DataFrame(
+    {
+        "category": ["Electronics", "Clothing", "Home & Garden", "Sports", "Books", "Toys", "Food"],
+        "value": [45200, 32100, 28400, 21800, 18500, 15200, 12300],
+    }
+)
+
+# Chart
+chart = (
+    alt.Chart(data)
+    .mark_bar(color="#306998", cornerRadiusTopLeft=3, cornerRadiusTopRight=3)
+    .encode(
+        x=alt.X(
+            "category:N",
+            title="Product Category",
+            sort="-y",
+            axis=alt.Axis(labelAngle=-45, labelFontSize=16, titleFontSize=20),
+        ),
+        y=alt.Y("value:Q", title="Sales ($)", axis=alt.Axis(labelFontSize=16, titleFontSize=20)),
+        tooltip=[alt.Tooltip("category:N", title="Category"), alt.Tooltip("value:Q", title="Sales", format="$,.0f")],
+    )
+    .properties(width=1600, height=900, title=alt.Title(text="Product Sales by Category", fontSize=24))
+    .configure_view(strokeWidth=0)
+    .configure_axis(grid=True, gridOpacity=0.3)
+)
+
+# Save as PNG and HTML
+chart.save("plot.png", scale_factor=3.0)
+chart.save("plot.html")