feat(pygal): implement box-basic (#1367)

## Implementation: `box-basic` - pygal

Implements the **pygal** version of `box-basic`.

**File:** `plots/box-basic/implementations/pygal.py`

---
:robot: *[impl-generate
workflow](https://github.com/MarkusNeusinger/pyplots/actions/runs/20447783616)*

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

plots/box-basic/implementations/pygal.py

@@ -1,15 +1,15 @@
 """ pyplots.ai
 box-basic: Basic Box Plot
 Library: pygal 3.1.0 | Python 3.13.11
-Quality: 92/100 | Created: 2025-12-14
+Quality: 91/100 | Created: 2025-12-23
 """
 
 import numpy as np
 import pygal
 from pygal.style import Style
 
 
-# Data - Generate distributions for different departments
+# Data - Generate salary distributions for different departments
 np.random.seed(42)
 categories = ["Engineering", "Marketing", "Sales", "Operations", "HR"]
 data = {
@@ -20,6 +20,10 @@
     "HR": np.random.normal(58000, 8000, 100),
 }
 
+# Add some outliers to demonstrate box plot features
+data["Engineering"] = np.append(data["Engineering"], [130000, 135000, 40000])
+data["Sales"] = np.append(data["Sales"], [120000, 25000])
+
 # Custom style using PyPlots colors
 custom_style = Style(
     background="white",
@@ -45,9 +49,11 @@
     y_title="Salary ($)",
     show_legend=True,
     legend_at_bottom=True,
+    legend_box_size=24,
     show_y_guides=True,
     show_x_guides=False,
     margin=50,
+    box_mode="tukey",
 )
 
 # Add data for each category

plots/box-basic/metadata/pygal.yaml

@@ -1,17 +1,24 @@
 library: pygal
 specification_id: box-basic
-created: 2025-12-14 09:04:02+00:00
-updated: 2025-12-14 09:04:02+00:00
+created: '2025-12-23T00:36:15Z'
+updated: '2025-12-23T00:47:37Z'
 generated_by: claude-opus-4-5-20251101
-workflow_run: 20205608996
-issue: 689
+workflow_run: 20447783616
+issue: 0
 python_version: 3.13.11
 library_version: 3.1.0
 preview_url: https://storage.googleapis.com/pyplots-images/plots/box-basic/pygal/plot.png
 preview_thumb: https://storage.googleapis.com/pyplots-images/plots/box-basic/pygal/plot_thumb.png
 preview_html: https://storage.googleapis.com/pyplots-images/plots/box-basic/pygal/plot.html
-quality_score: 92
+quality_score: 91
 review:
-  strengths: []
-  weaknesses: []
-  improvements: []
+  strengths:
+  - Excellent data choice with realistic salary distributions across departments
+  - Proper use of Tukey box mode for standard box plot visualization
+  - Clean implementation of outliers in Engineering and Sales departments
+  - Good color palette that is accessible and visually distinct
+  - Correct title format and proper axis labeling with units
+  weaknesses:
+  - Legend box size is small relative to the large chart dimensions, making it less
+    prominent
+  - Outlier markers could be slightly larger for better visibility at this resolution