add some documentation for ReadSubzoneTecplot

Author: rbaum-developer

module/read/ReadSubzoneTecplot/CMakeLists.txt

@@ -7,6 +7,6 @@ set(HEADERS ReadSubzoneTecplot.h)
 set(SOURCES ReadSubzoneTecplot.cpp)
 
 #add_definitions(-DPYBIND11_DETAILED_ERROR_MESSAGES)
-add_module(ReadSubzoneTecplot "read SZL Tecplot data" ${HEADERS} ${SOURCES})
+add_module(ReadSubzoneTecplot "read SZL (Sub-Zone Load-on-demand) Tecplot data" ${HEADERS} ${SOURCES})
 
 target_link_libraries(ReadSubzoneTecplot PRIVATE vistle_tecio)

module/read/ReadSubzoneTecplot/ReadSubzoneTecplot.md

@@ -0,0 +1,28 @@
+[headline]:<>
+
+## Purpose
+
+The **ReadSubzoneTecplot** module reads Tecplot 360 Sub-Zone Load-on-demand (`*.szplt`) data from a directory. Only structured (ordered) zones are supported. All .szplt files found in the input directory are considered according to the selected time-step range and step increment. 
+
+## Ports
+[moduleHtml]:<>
+
+
+- `grid_out` — structured grid (all subzones)
+- `field_out_0` .. `field_out_4` — data fields chosen by the user (up to five). 
+
+The first output port (`grid_out`) provides the structured geometry. The remaining ports provide solution fields selected via the module parameters.
+
+[parameters]:<>
+
+## Behavior
+
+- If `static_geometry` is enabled, the grid is loaded once from the specified reference time step (`static_ref_timestep`) and reused for all output timesteps.
+- If `static_geometry` is disabled, the geometry is reloaded for each requested timestep.
+- Data fields are attached to the corresponding `field_out_*` ports only if the selected field exists in the file/zone; missing fields are skipped.
+
+## Related Modules
+
+### Similar Modules
+
+[ReadIagTecplot]()