Changes:
- Updated the "Try it now" button on the website's header navigation, it
will now open a signup/login modal on every page (excluding the
dedicated /register and /login pages)
- Updated the website to assign Fleet Premium instances hosted on Render
to eligible users. All other users will be given a 30-day Fleet Premium
trial license key to use with their deployment method of choice.
- Added a script that creates and manages a pool of Render instances.
- Added a new database model: `RenderProofOfValue`
- Added four new email templates
- Updated primary button colors to match the core product.
- Removed the organization requirement for new users signing up.
- Added a new component: `<signup-modal>`
- Added a new attribute to the User model: `fleetPremiumTrialType`
