feat: Display STF version in Web UI (#858)

* feat: Display STF version in Web UI

Adds the STF application version to the main menu in the Web UI.

Changes:
- Modified `lib/units/app/index.js` to read the version from `package.json` and make it available to the frontend via the `GLOBAL_APPSTATE.config.stfVersion` variable.
- Updated `res/app/menu/menu.pug` to display this version in the top navigation bar, near the help icon. The format is "vX.Y.Z".
- Added an E2E test (`res/test/e2e/menu/menu-spec.js`) to verify the presence and correct format of the version string in the UI.

Signed-off-by: matanbaruch <matan.baruch@unity3d.com>

* Update menu-spec.js

Signed-off-by: matanbaruch <matan.baruch@unity3d.com>

* fix: lint

Signed-off-by: matanbaruch <matan.baruch@unity3d.com>

* feat: Add application state to root scope and style version text in menu

- Introduced a new run block in `app.js` to attach the application state to the `$rootScope`.
- Added CSS styles for the version text in the menu to enhance its visibility and layout.

Signed-off-by: matanbaruch <matan.baruch@unity3d.com>

* fix: Correct path to package.json in index.js

Updated the import statement for package.json in lib/units/app/index.js to use the correct relative path, ensuring proper access to the application version information.

Signed-off-by: matanbaruch <matan.baruch@unity3d.com>

---------

Signed-off-by: matanbaruch <matan.baruch@unity3d.com>
Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

lib/units/app/index.js

@@ -16,6 +16,7 @@ var compression = require('compression')
 
 var logger = require('../../util/logger')
 var pathutil = require('../../util/pathutil')
+var packageJson = require('../../../package.json')
 
 var auth = require('./middleware/auth')
 var deviceIconMiddleware = require('./middleware/device-icons')
@@ -112,6 +113,7 @@ module.exports = function(options) {
           wsUrl.query.uip = req.ip
           return url.format(wsUrl)
         })()
+      , stfVersion: packageJson.version
       }
     , user: req.user
     }