feat: tipo datascience OutlierResult (sum)

Tipo suma para clasificar datos como Normal u Outlier con z-score.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

types/datascience/outlier_result.go

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+package datascience
+
+// OutlierResult is a sum type representing whether a data point is normal or an outlier.
+type OutlierResult interface{ outlierResult() }
+
+// Normal indicates the data point is within expected range.
+type Normal struct {
+	Index int
+	Value float64
+}
+
+// Outlier indicates the data point is anomalous.
+type Outlier struct {
+	Index  int
+	Value  float64
+	ZScore float64
+}
+
+func (Normal) outlierResult()  {}
+func (Outlier) outlierResult() {}

types/datascience/outlier_result.md

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+---
+name: outlier_result
+lang: go
+domain: datascience
+version: "1.0.0"
+algebraic: sum
+definition: |
+  type OutlierResult interface{ outlierResult() }
+  type Normal struct { Index int; Value float64 }
+  type Outlier struct { Index int; Value float64; ZScore float64 }
+description: "Tipo suma que clasifica un dato como Normal o Outlier con su z-score. Usado por DetectOutliers."
+tags: [datascience, outlier, anomaly, statistics]
+uses_types: []
+file_path: "types/datascience/outlier_result.go"
+---