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
     })

crates/engine/src/cmd/whatif.rs

@@ -108,7 +108,7 @@ fn cell_arg(s: &Session, p: &Json, key: &str, cmd: &str) -> Result<(usize, CellR
 
 /// A range text (`"A1:C9"`, `"Sheet2!A:C"`) resolved against the workbook. Whole rows/columns
 /// are trimmed to the used range.
-fn parse_range(wb: &Workbook, t: &str, cmd: &str) -> Result<(usize, RangeRef)> {
+pub(crate) fn parse_range(wb: &Workbook, t: &str, cmd: &str) -> Result<(usize, RangeRef)> {
     let (sh, body) = split_sheet(t);
     let si = sheet_named(wb, sh, wb.active_sheet, cmd)?;
     let r = RangeRef::parse(body.trim()).ok_or_else(|| bad(cmd, format!("not a range: `{t}`")))?;