Fix documentation inconsistencies and errors

Corrections made:
- Fix CMOS clear time to 60 seconds (was inconsistently 30s in some places)
- Fix BIOS filename capitalization: Robin5.00 (capital R)
- Correct power button info: no header exists (soldering required)
- Fix VRAM allocation descriptions to emphasize 512MB is dynamic
- Standardize BIOS name to BC250_3.00_CHIPSETMENU
- Remove amdgpu.sg_display=0 from Fedora defaults (only needed for kernel <6.10)
- Fix GNOME description: now recommended for stability (was incorrectly saying issues)
- Fix Bazzite PSU requirement: 300W minimum (was incorrectly 90W)
- Fix SteamOS status: now works after Mesa updates
- Clarify DisplayPort audio: passive adapters usually work

docs/getting-started/introduction.md

@@ -41,7 +41,7 @@ With proper Linux setup, the BC-250 delivers performance comparable to:
 
 **Other limitations:**
 
-- No native audio over DisplayPort (workarounds available)
+- Audio over DisplayPort can be unreliable with some adapters (passive adapters usually work)
 - No built-in WiFi/Bluetooth (USB adapters work)
 - Limited instruction set (some AVX features missing)
 - High idle power consumption (~50-80W without optimization)

docs/getting-started/quick-start.md

@@ -14,10 +14,10 @@ Get your BC-250 up and running with this fast-track checklist.
 
 1. Download modded BIOS from [bc250-bios repository](https://gitlab.com/TuxThePenguin0/bc250-bios/)
 2. Format USB stick as FAT32
-3. Rename BIOS file to `robin5.00`
+3. Rename BIOS file to `Robin5.00` (capital R)
 4. Copy to USB root directory
 5. Use included flashing utility
-6. **CRITICAL:** Clear CMOS after flashing (remove battery 30 seconds)
+6. **CRITICAL:** Clear CMOS after flashing (remove battery 60 seconds)
 
 **Difficulty:** Easy