Add DiSEqC motor control, QO-100 DATV reception, and carrier survey

Firmware v3.03.0: DiSEqC Manchester encoder (cmd 0x8D extended),
parameterized spectrum sweep (0xBA), adaptive blind scan (0xBB),
error code reporting (0xBC). All new function locals moved to XDATA
to fit within FX2LP 256-byte internal RAM constraint.

Motor control: DiSEqC 1.2 positioner with USALS GotoX, stored
positions, interactive keyboard jog, 30-second safety auto-halt.

QO-100 DATV: Es'hail-2 wideband transponder tools — LNB IF
calculator, narrowband scan, tune, and TS-to-video pipe (ffplay/mpv).

Carrier survey: six-stage pipeline (coarse sweep → peak detection →
fine sweep → blind scan → TS sample → catalog). JSON catalog with
differential analysis, QO-100 optimized mode, CSV/text export.

TUI: F9 Motor screen (3-column layout with signal gauge), F10 Survey
screen (Full Band + QO-100 tabs). Bridge, demo, and theme updated.

Docs: motor.mdx, survey.mdx, qo100-datv.mdx guide, tui.mdx updated
for 10 screens. Site builds 41 pages, all links valid.

site/astro.config.mjs

@@ -114,12 +114,20 @@ export default defineConfig({
             { label: 'Tuning', slug: 'tools/tuning' },
             { label: 'SkyWalker RF Tool', slug: 'tools/skywalker' },
             { label: 'SkyWalker TUI', slug: 'tools/tui' },
+            { label: 'Motor Control', slug: 'tools/motor' },
+            { label: 'Carrier Survey', slug: 'tools/survey' },
             { label: 'EEPROM Utilities', slug: 'tools/eeprom-utilities' },
             { label: 'Debugging', slug: 'tools/debugging' },
             { label: 'TS Analyzer', slug: 'tools/ts-analyzer' },
             { label: 'Spectrum Analysis', slug: 'tools/spectrum-analysis' },
           ],
         },
+        {
+          label: 'Guides',
+          items: [
+            { label: 'QO-100 DATV Reception', slug: 'guides/qo100-datv' },
+          ],
+        },
         {
           label: 'Reference',
           items: [