feat: Add trial property to licenses (#4372)

* feat: Add trial property to licenses

This allows the frontend to display whether the user is on
a trial license of Coder. This is useful for advertising
Enterprise functionality.

* Improve tests for license enablement code

* Add all features property

.vscode/settings.json

@@ -9,8 +9,8 @@
     "cliflag",
     "cliui",
     "codecov",
-    "Codespaces",
     "coderd",
+    "coderdenttest",
     "coderdtest",
     "codersdk",
     "cronstrue",
@@ -24,6 +24,7 @@
     "drpcmux",
     "drpcserver",
     "Dsts",
+    "enablements",
     "fatih",
     "Formik",
     "gitsshkey",