feat: ADD Terms of service link (#985)

Adds an optional terms of service link for sites that need it.

---------

Co-authored-by: Jonathan Perret <j-github@jonathanperret.net>

app/client/ui/HomeLeftPane.ts

@@ -146,6 +146,14 @@ export function createHomeLeftPane(leftPanelOpen: Observable<boolean>, home: Hom
           ) : null
         ),
         createHelpTools(home.app),
+        (commonUrls.termsOfService ?
+          cssPageEntry(
+            cssPageLink(cssPageIcon('Memo'), cssLinkText(t("Terms of service")),
+              { href: commonUrls.termsOfService, target: '_blank' },
+              testId('dm-tos'),
+            ),
+          ) : null
+        ),
       )
     )
   );