Data: Analysis ToolPak with 13 tools and the Data Analysis dialog (#312)

data.analysisToolPak runs Descriptive Statistics, Histogram, Correlation,
Covariance, Regression, Moving Average, Exponential Smoothing, Rank and
Percentile, the three t-Tests, F-Test and Anova: Single Factor, writing a
static report to an output range or a new sheet. Non-empty output cells are
refused unless overwrite is set; the dialog asks instead.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/mod.rs

@@ -1,6 +1,7 @@
 //! The command registry. Ids follow Excel's ribbon (`home.bold`, `insert.chart`,
 //! `data.sortAscending`) plus primitive editing commands (`cell.set`, `selection.set`).
 
+pub mod analysis;
 pub mod data;
 pub mod draw;
 pub mod edit;
@@ -120,6 +121,7 @@ pub fn command_specs() -> &'static [CommandSpec] {
         v.extend(spelling::specs());
         v.extend(pivot::specs());
         v.extend(whatif::specs());
+        v.extend(analysis::specs());
         v.extend(print::specs());
         v
     })