v0.4.1: launcher scripts (run.sh / run.command / run.bat)

First run needs the CLI to install the MITM CA into the system trust
store (sudo/admin prompt), which the UI alone can't do reliably from a
double-click. Add a small launcher for each platform that runs the CLI
with --install-cert once, then starts the UI. Each release archive now
contains a run.* script alongside the binaries.

assets/launchers/run.bat

@@ -0,0 +1,30 @@
+@echo off
+REM mhrv-rs launcher for Windows.
+REM Runs the CLI once to initialize the MITM CA (may trigger a UAC prompt when
+REM installing into the Windows trust store), then launches the UI.
+
+setlocal
+cd /d "%~dp0"
+
+if not exist "mhrv-rs.exe" (
+    echo error: mhrv-rs.exe not found next to this script.
+    pause
+    exit /b 1
+)
+
+echo Initializing MITM CA (a UAC prompt may appear)...
+mhrv-rs.exe --install-cert
+if errorlevel 1 (
+    echo warning: CA install returned non-zero. The UI can still run,
+    echo but HTTPS sites may show certificate warnings until the CA is trusted.
+)
+
+if exist "mhrv-rs-ui.exe" (
+    echo Starting mhrv-rs UI...
+    start "" "mhrv-rs-ui.exe"
+) else (
+    echo UI binary not found. Running CLI proxy instead.
+    mhrv-rs.exe
+)
+
+endlocal