refactor(symfony-table): model rows/cells with enums instead of PhpMixed

The Table helper modeled a row's cells as PhpMixed and recovered the concrete
TableCell/TableSeparator types via runtime instance_of, leaving the entire
mixed/array bridge (to_row_vec, cell_colspan, row_get, ...) as todo!(). Replace
that with proper Row/Cell enums:

  Row  = HeaderDivider | Separator(TableSeparator) | Cells(Vec<Cell>)
  Cell = Null | Value(String) | Cell(TableCell) | Separator(TableSeparator)

The internal header/body boundary that PHP detects by object identity
($divider === $row) becomes the dedicated Row::HeaderDivider variant. Style
arguments (PHP string|TableStyle) become a StyleName enum, so Table::new no
longer panics in resolve_style's instance_of stub; TableStyle derives Clone so
named styles resolve from the registry.

PhpMixed-based callers (SymfonyStyle::table, render_table, auditor's sanitize)
bridge via From<PhpMixed> for Cell/Row at the boundary.

Un-ignores LicensesCommandTest text-format cases (4) and
BaseDependencyCommandTest::why; output matches PHP exactly. Removes ~15 impl
todo!()s in the Table helper.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/crates/shirabe/src/advisory/auditor.rs b/crates/shirabe/src/advisory/auditor.rs
index ca49591..fd54595 100644
--- a/crates/shirabe/src/advisory/auditor.rs
+++ b/crates/shirabe/src/advisory/auditor.rs
@@ -470,7 +470,7 @@ impl Auditor {
                 table.add_row(ConsoleIO::sanitize(
                     PhpMixed::List(row.into_iter().map(PhpMixed::String).collect()),
                     false,
-                ))??;
+                ).into());
                 table
                     .set_column_width(1, 80)
                     .set_column_max_width(1, 80)
@@ -595,7 +595,7 @@ impl Auditor {
                     PhpMixed::String(replacement),
                 ]),
                 false,
-            ));
+            ).into());
         }
 
         table.render();