Fixed: Calendar Feed URL wasn't loading necessary scripts

Added: You can now show other calendar feeds on a calendar using the Calendar Feed URL setting [(read how to add calendar feeds)](https://docs.gravitykit.com/article/899-displaying-events-from-another-calendar)

* Fixed: Fatal error when loading plugin translations

* Fixed: Slow loading times on some hosts

* Fixed: Plugin failing to install on some hosts

* Added: Support for future "Event" Gravity Forms field type when choosing a date field

* Fixed: Plugin was not appearing in the "Add-Ons" section of the Gravity Forms System Status page

* Improved: Now you can use the [`{get}` Merge Tag](https://docs.gravitykit.com/article/314-the-get-merge-tag) to filter displayed entries by passing URL parameters

* Updated: The name of the plugin is now GravityCalendar, so we updated shortcodes to use the new name. Prior shortcodes will continue to work!

    - `[gravitycalendar]` instead of `[gv_calendar]`

    - `[gravitycalendar_link]` instead of `[gv_calendar_link]`

    - `[gravitycalendar_copy_button]` instead of `[gv_calendar_copy_button]`

    - `[gravitycalendar_export_button]` instead of `[gv_calendar_export_button]`

* Updated: Use the GravityCalendar icon in the plugin menu and on blocks

* Fixed: Scripts and styles were loading on pages without calendars

__Developer Updates:__

* Updated: FullCalendar library from 5.10.1 to 5.11.3

* Updated: Popper library from 2.9.3 to 2.11.6

* Updated: Uses our new GravityCalendar icon in the Gravity Forms menu

* Fixed: Javascript error when configuring Legacy Widgets in the WordPress Dashboard

* Tested to WordPress 6.0.1

Fixed: Invalid `.ics` file is generated when using a manual timezone offset (e.g., 'UTC-4' instead of 'America/New_York')