data_table: declarative cell renderers Phase 1 (Badge/Progress/Duration/Icon)

Adds TableInput.column_specs sidecar field enabling apps to declare Badge,
Progress, Duration and Icon renderers per column without writing ImGui inline.
Back-compat: apps without column_specs compile and behave identically.

- data_table_types.h: CellRenderer enum, BadgeRule, IconMapEntry, ColumnSpec types
- data_table.cpp: hex_to_imcolor helper, icon_name_to_glyph static map (~30 Tabler icons),
  draw_cell_custom dispatcher, integration in Stage-0 and Stage-N cell loops and draw_extra_panel
- Bump version 1.0.0 -> 1.1.0 with capability growth log
- cpp/tests/test_column_specs.cpp: 5 smoke/linker tests (back-compat + 4 renderer types)
- cpp/tests/CMakeLists.txt: register test_column_specs target linked against fn_table_viz
- types/core/{cell_renderer,badge_rule,icon_map_entry,column_spec}.md: registry type mds
- docs/capabilities/data_table_renderers.md: canonical doc with end-to-end examples
- docs/capabilities/INDEX.md: added data-table-renderers group

All tests green: test_column_specs 5/5, test_fn_table_viz_smoke 8/8,
tql_emit 41/41, tql_apply 88/88, Wave-1 tests 8/8.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cpp/functions/core/data_table_types.h

@@ -1,6 +1,7 @@
 // data_table_types — types compartidos del stack TQL (Table Query Language).
 // Promovido al registry desde cpp/apps/primitives_gallery/playground/tables/.
 // Ver issue 0081 + docs/TQL.md. Pure value types + enums.
+// Issue 0081-N: CellRenderer / ColumnSpec / BadgeRule / IconMapEntry (v1.1.0).
 #pragma once
 
 #include <string>
@@ -126,7 +127,55 @@ enum class ViewMode {
 // ----------------------------------------------------------------------------
 enum class JoinStrategy { Left, Inner, Right, Full };
 
+// ----------------------------------------------------------------------------
+// CellRenderer: declarative rendering mode per column (issue 0081-N, v1.1.0).
+// ----------------------------------------------------------------------------
+enum class CellRenderer : uint8_t {
+    Text     = 0,   // default — current behavior
+    Badge    = 1,   // colored badge per-value
+    Progress = 2,   // progress bar (0..1 or 0..100)
+    Duration = 3,   // milliseconds with color gradient
+    Icon     = 4,   // icon lookup by value string
+    // Future (Phase 2-3): Button=5, TextInput=6, Custom=7. IDs reserved.
+};
+
+// BadgeRule: maps a cell value to a colored badge label.
+struct BadgeRule {
+    std::string value;      // exact match (case-sensitive)
+    std::string color_hex;  // "#rrggbb" or "rrggbb"
+    std::string label;      // optional visual override; "" -> use value as-is
+};
+
+// IconMapEntry: maps a cell value to a Tabler icon macro name + optional color.
+struct IconMapEntry {
+    std::string value;
+    std::string icon_name;  // e.g. "TI_CHECK", "TI_X" — resolved via static map
+    std::string color_hex;  // optional; "" -> default text color
+};
+
+// ColumnSpec: rendering spec for one column. Indexed by column position.
+struct ColumnSpec {
+    std::string  id;                                    // stable id, used in TQL (future)
+    CellRenderer renderer = CellRenderer::Text;
+
+    // Badge
+    std::vector<BadgeRule>    badges;
+
+    // Progress: cell value is float 0..1 (or 0..100 if progress_scale_100 = true)
+    bool                       progress_scale_100 = false;
+    std::string                progress_color_hex;      // override bar color; "" -> ImPlot auto
+
+    // Duration: cell value in milliseconds (float); gradient green<warn<yellow<error<red
+    float                      duration_warn_ms  = 1000.0f;
+    float                      duration_error_ms = 5000.0f;
+
+    // Icon
+    std::vector<IconMapEntry>  icon_map;
+};
+
+// ----------------------------------------------------------------------------
 // Tabla extra pasada al render() para joins. Owner externo (caller).
+// ----------------------------------------------------------------------------
 struct TableInput {
     std::string                 name;       // identificador estable (matchea Join.source)
     std::vector<std::string>    headers;
@@ -134,6 +183,12 @@ struct TableInput {
     const char* const*          cells = nullptr;  // row-major, headers.size() cols x rows filas
     int                         rows  = 0;
     int                         cols  = 0;
+
+    // NEW (issue 0081-N, v1.1.0): optional declarative renderers per column.
+    // empty -> all columns use default Text rendering (back-compat preserved).
+    // If non-empty, size must equal cols (or be 0 for "no specs").
+    // column_specs are caller-managed; not persisted in TQL yet (Phase 2).
+    std::vector<ColumnSpec>     column_specs;
 };
 
 // Join clause: une la tabla actual con `source` por las parejas `on`,