WinDbg plugin: load dbgeng.dll dynamically from Debugging Tools directory
instead of static linking (system dbgeng.dll lacks remote DebugConnect).
Copy tools dbghelp.dll next to exe so it loads before System32 version.
Add COM init on DbgEng thread, browse for tools dir, styled dialog.
Editor: derive darker background via theme.background.darker(115) for
visual depth between chrome and editor surfaces.
UI: global scrollbar styling, workspace accent bar 1px, pane tab font
from editor settings, workspace dock default width 128px.
- Add WinDbgMemory plugin with debug server connection support
- Replace ProcessMemory plugin with Windows-specific ProcessMemoryWindows
- Simplify WinDbg dialog: single panel, no tabs, palette-based theming
- Fix example text visibility on dark themes (QPalette::Dark -> Disabled WindowText)
- Fix "file" -> "File" capitalization in source menu
- Add windbg_provider and com_security tests
