[fix] Remove headers from auxiliary sections (#48)

* heeaders removed from auxiliary sections

* warning removal efforts

Author: piotrkluba

docs/02.simulation-setup/04.output/02.outputs-list/16.force-output.md

@@ -98,7 +98,7 @@ Force Output is useful for:
 <details>
 <summary><h3 style="display:inline-block"> 🐍 Python Example Usage</h3></summary>
 
-#### Basic Force Output Example
+**Basic Force Output Example**
 
 ```python
 import flow360 as fl
@@ -117,7 +117,7 @@ force_output = fl.ForceOutput(
 )
 ```
 
-#### Force Output with Moving Statistics
+**Force Output with Moving Statistics**
 
 ```python
 # Define force output with moving statistics

docs/02.simulation-setup/04.output/02.outputs-list/17.force-distribution-output.md

@@ -68,7 +68,7 @@ The output includes force and moment coefficients (CL, CD, CFx, CFy, CFz, CMx, C
 <details>
 <summary><h3 style="display:inline-block"> 🐍 Python Example Usage</h3></summary>
 
-#### Basic Force Distribution Output Example
+**Basic Force Distribution Output Example**
 
 ```python
 import flow360 as fl

docs/02.simulation-setup/04.output/02.outputs-list/18.time-averaging-force-distribution-output.md

@@ -153,7 +153,7 @@ Time-averaged force distribution output is particularly useful in the following
 <details>
 <summary><h3 style="display:inline-block"> 🐍 Python Example Usage</h3></summary>
 
-#### Basic Time-Averaged Force Distribution Output Example
+**Basic Time-Averaged Force Distribution Output Example**
 
 ```python
 import flow360 as fl
@@ -167,7 +167,7 @@ time_avg_spanwise = fl.TimeAverageForceDistributionOutput(
 )
 ```
 
-#### Combined Regular and Time-Averaged Outputs
+**Combined Regular and Time-Averaged Outputs**
 
 ```python
 # Use both regular and time-averaged outputs for comparison

docs/02.simulation-setup/04.output/README.md

@@ -36,10 +36,11 @@
 - **[Time-averaging Isosurface Output](./02.outputs-list/12.time-averaging-isosurface-output.md)** - Time-averaged flow field data on surfaces of constant variable value
 - **[Aeroacoustic Output](./02.outputs-list/13.aeroacoustic-output.md)** - Data for aeroacoustic analysis at observer positions
 - **[Streamline Output](./02.outputs-list/14.streamline-output.md)** - Visualization of 3D flow structures
-- **[Force Output](./02.outputs-list/15.force-output.md)** - Force and moment coefficient outputs with optional statistics
-- **[Force Distribution Output](./02.outputs-list/16.force-distribution-output.md)** - Custom force and moment distribution along a specified direction
-- **[Time-averaging Force Distribution Output](./02.outputs-list/17.time-averaging-force-distribution-output.md)** - Time-averaged custom force and moment distribution
-- **[Output Formats](./02.outputs-list/18.output-formats.md)** - File format specifications for output data
+- **[Time-averaging Streamline Output](./02.outputs-list/15.time-averaging-streamline-output.md)** - Time-averaged visualization of 3D flow structures
+- **[Force Output](./02.outputs-list/16.force-output.md)** - Force and moment coefficient outputs with optional statistics
+- **[Force Distribution Output](./02.outputs-list/17.force-distribution-output.md)** - Custom force and moment distribution along a specified direction
+- **[Time-averaging Force Distribution Output](./02.outputs-list/18.time-averaging-force-distribution-output.md)** - Time-averaged custom force and moment distribution
+- **[Output Formats](./02.outputs-list/19.output-formats.md)** - File format specifications for output data
 
 ```{toctree}
 :hidden: