feat: Hermit 1.1.0 — HERMIT_* env, Tauri desktop shell

Wire hermit_getenv across the engine, rebrand WebUI/systemd/docs, and
add apps/desktop (Tauri 2 + React) with a DeepSeek-Harness-like UI.
Qt app/ is frozen; full libcstcore FFI is scaffolded behind --features engine.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/windows/cst-agent.nsi

@@ -16,8 +16,8 @@ RequestExecutionLevel user
   !define OUTFILE "cst-agent-${VERSION}-windows-x86_64-setup.exe"
 !endif
 
-!define APP "CST-Agent"
-!define UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\cst-agent"
+!define APP "Hermit"
+!define UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\hermit"
 
 !include "MUI2.nsh"
 !include "LogicLib.nsh"