migrate collectors + results tables to data_table::render (issue 0081-J)

- Include viz/data_table.h; add g_dt_collectors + g_dt_results State members
- ##collectors (3 cols): flat cells array -> data_table::render, Text renderers
- ##results (4 cols): flat cells array -> data_table::render, Badge on Kind col
  (function=#3b82f6, pipeline=#8b5cf6, component=#f59e0b)
- CMakeLists.txt: add fn_table_viz guard link block
- app.md: populate uses_functions with Wave-1 stack IDs

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

app.md

@@ -4,7 +4,12 @@ lang: cpp
 domain: tools
 description: "Lanzador GUI de funciones del registry para recolectar datos online. Panel de busqueda FTS5, jobs queue async (workers concurrentes), pipeline builder DAG, browser DuckDB, assertions/proposals. Aplica bucle reactivo de 5 pasos sobre operations.db propia."
 tags: [imgui, data-collection, scraping, duckdb, jobs, cdp]
-uses_functions: []
+uses_functions:
+  - data_table_cpp_viz
+  - viz_render_cpp_viz
+  - compute_stage_cpp_core
+  - tql_to_sql_cpp_core
+  - llm_anthropic_cpp_core
 uses_types: []
 framework: "imgui"
 entry_point: "main.cpp"