feat: Typst-typeset statements in US accounting format

The printpdf statements padded columns with spaces in a proportional font
(amounts didn't line up), had no company name, printed negatives as
"-207.68", and put everything on one page (a long statement was silently
cut off past ~70 lines). Now:

- PDFs are typeset by Typst from one template,
  ledger-import/templates/statement.typ. The laid-out statement goes in as
  JSON data (sys.inputs), so account names are never parsed as markup.
  Fonts are bundled (typst-assets: Libertinus Serif), so output doesn't
  depend on the machine and is byte-for-byte deterministic. Statements
  paginate, with the company/title repeated on later pages and "Page n of
  m" plus "Prepared from journal through seq N" in the footer.
- US accounting presentation, decided once in ledger-import::report and
  applied by both PDF and XLSX: tabular figures; "$" on each section's
  first amount and on every subtotal and total, pinned to the column's
  left edge; negatives in parentheses with the closing paren hanging (its
  width reserved on every row, so decimal points align); zero as a dash;
  a single rule above sums (none over an empty section) and a double rule
  under statement totals; amounts never bold, because bold figures are
  wider and would leave the decimal column. XLSX uses Excel's own
  Accounting formats for the same result.
- Cash flow: "Net change in cash" is a subtotal; only "Cash at end of
  period" takes the double rule.
- Core fix: cash_flow walked the chart in HashMap order, so the order of
  working-capital and financing lines could change between runs. Lines
  now follow account code. Test: five owners, twenty runs, always
  3000/3001/3003/3005/3009; fails without the sort.

New dependencies (ledger-import): typst, typst-layout, typst-pdf,
typst-assets (fonts), typst-as-lib (World/font plumbing), serde_json (the
template's data). Removed: printpdf. Release ledger-mcp grows by the
bundled fonts.

Tests: exact template data for a hand-built P&L (like a golden); same
statement renders to identical bytes; 200 rows of Typst markup
characters render literally and span several pages; currency-sign and
rule placement; amount splitting.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MtYEaR6M6Ybdhm6X98BWNu

crates/ledger-core/tests/statements.rs

@@ -221,3 +221,47 @@ fn a_closed_period_still_reports_its_earnings() {
     assert_eq!(cf.cash_from_financing, dec(10_000));
     assert_eq!(cf.net_change_in_cash, dec(11_700));
 }
+
+/// Cash flow lines come out in account-code order, every time. (The chart
+/// iterates in hash order; the statement must not.)
+#[test]
+fn cash_flow_lines_are_in_code_order() {
+    for _ in 0..20 {
+        let mut l = Ledger::new(Currency::USD);
+        let cash = l
+            .add_account("1000", "Cash", AccountType::Asset, None, false)
+            .unwrap();
+        let mut owners = Vec::new();
+        for code in ["3005", "3001", "3009", "3000", "3003"] {
+            owners.push(
+                l.add_account(code, code, AccountType::Equity, None, false)
+                    .unwrap(),
+            );
+        }
+        for o in &owners {
+            post(&mut l, d(3, 1), "Contribution", cash, *o, 100);
+        }
+        let cf = cash_flow(
+            &l,
+            &CashFlowParams {
+                start: d(1, 1),
+                end: d(12, 31),
+                cash_accounts: vec![cash],
+                financing_accounts: vec![],
+            },
+        )
+        .unwrap();
+        // Labels read "Owner contributions — 3000 3000" (code, then name).
+        let codes: Vec<&str> = cf
+            .financing
+            .iter()
+            .map(|f| f.label.rsplit(' ').next().unwrap())
+            .collect();
+        assert_eq!(
+            codes,
+            ["3000", "3001", "3003", "3005", "3009"],
+            "{:?}",
+            cf.financing
+        );
+    }
+}