Update to version v0.1.2.a.7 and implement auto-update feature in install.sh

- Updated index.html and version.txt to reflect the new release version v0.1.2.a.7.
- Added an auto-update option in install.sh to streamline the update process without user prompts.
- Modified terminal.py to support the new auto-update flag during updates.

index.html

@@ -46,7 +46,7 @@
     <div class="hero__metrics">
       <div class="metric">
         <p class="metric__label">Current release</p>
-        <p class="metric__value">v0.1.2.a.6</p>
+        <p class="metric__value">v0.1.2.a.7</p>
       </div>
       <div class="metric">
         <p class="metric__label">Supported families</p>