BIM: Default positions of 'Annotation Tools' and 'General Tools' toolbars

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Problem description

**Feature Request**

**Current Situation**
During the first startup of the BIM workbench 'Annotation Tools' and 'General Tools' toolbars are placed so that only one icon from them is visible on a typical 1920x1080pc screen when FreeCAD window is maximized. That leads to user immediately needing to move these toolbars around:


**Proposed Solution**
If it is not too complicated to implement, it would be better to have 'Annotation Tools' and 'General Tools' toolbars could be place one row bellow by default. This would make them visible in full on a default maximized 1920x1080px screen.


### Full version info

```shell
OS: Windows 10 build 19045
Architecture: x86_64
Version: 1.1.0dev.20251104 (Git shallow)
Build date: 2025/11/04 19:07:44
Build type: Release
Branch: main
Hash: af014a1bb44264d749ba9522917f0d1ac76c4bbf
Python 3.11.14, Qt 6.8.3, Coin 4.0.3, Vtk 9.3.1, boost 1_86, Eigen3 3.4.0, PySide 6.8.3
shiboken 6.8.3, xerces-c 3.3.0, IfcOpenShell 0.8.2, OCC 7.8.1
Locale: English/United States (en_US)
Navigation Style/Orbit Style/Rotation Mode: CAD/Rounded Arcball/Window center
Stylesheet/Theme/QtStyle: FreeCAD.qss/FreeCAD Light/
Logical DPI/Physical DPI/Pixel Ratio: 96/92.6073/1
```

### Subproject(s) affected?

BIM

### Anything else?

There are more issues with the default setup of the workbench, but this one is very low hanging fruit worth considering.
BIM workbench has the most toolbars from all core workbenches, so it is the one most hit by not having some tools visible out of the box.

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

The issue identifies the BIM workbench and the 'Annotation Tools' and 'General Tools' toolbars, but names no files or tests. Start by locating the BIM workbench startup and default toolbar layout entry point, then inspect how the initial arrangement is defined. Done means both toolbars appear fully visible on a maximized 1920x1080 display during first startup.

Written by the indexing model from the issue text.