fix: MSVC build support, modern theme, vergilius fnptr import

- CMake: detect MSVC↔MinGW Qt ABI mismatch at configure time (#10)
- CMake: add /utf-8 /MP for MSVC builds
- CMake: fix theme/example deployment for multi-config generators (MSVC)
- Auto-run windeployqt post-build so correct Qt DLLs are always deployed
- Add Modern theme (dark blue with cyan/purple/amber accents)
- Vergilius import: handle function pointer typedefs

src/themes/defaults/modern.json

@@ -0,0 +1,32 @@
+{
+    "name": "Modern",
+    "background": "#0e1117",
+    "backgroundAlt": "#12151c",
+    "surface": "#181d27",
+    "border": "#1e2533",
+    "borderFocused": "#4fc3f7",
+    "button": "#1e2433",
+    "text": "#a8bbd0",
+    "textDim": "#7a8fa8",
+    "textMuted": "#566278",
+    "textFaint": "#3d4d6a",
+    "hover": "#1e2433",
+    "selected": "#232a3a",
+    "selection": "#1a4a5e",
+    "syntaxKeyword": "#9d8cff",
+    "syntaxNumber": "#f0c060",
+    "syntaxString": "#26c6b3",
+    "syntaxComment": "#566278",
+    "syntaxPreproc": "#f472b6",
+    "syntaxType": "#4fc3f7",
+    "indHoverSpan": "#f0c060",
+    "indCmdPill": "#12151c",
+    "indDataChanged": "#6bda8a",
+    "indHeatCold": "#f0c060",
+    "indHeatWarm": "#e8946a",
+    "indHeatHot": "#ff6b6b",
+    "indHintGreen": "#2a5e3a",
+    "markerPtr": "#ff6b6b",
+    "markerCycle": "#f0c060",
+    "markerError": "#3a1a1a"
+}