Duplicate template save CTA is enabled by default

Ensuring that when a user duplicates a template that the save CTA is enabled by default vs disabled.

Create/edit template page input and behaviour changes

Create/edit template page have the following changes:

• Template text is now a 'textarea' better supporting longer values.
• Update/Save button will now be enabled upon input change (on keypress).

Bugfix: 'text' template value

Fixing issues where a blank 'text' value for a template would cause 500's from the 'get-template' endpoint.
Additionally including a small readme update.

UI enhancements

• Created at timestamps are now formatted differently rather to aid readability.
• Longer replacement tag names are better displayed within the send test email modal.
• Minor .env file tweak with included comment to now better describe which properties are configurable.

Subtle stying and UX improvements

• 'New version' indicator icon added, hover text decoration styles changes.
• 'New version' indicator and index table CTA's have tooltips applied.
• Readme updates.
• 'Delete template' modal language changes and dynamic template name included in header.

Introducing 'send test email' functionality

Per each template listed, there is now a new option in the menu list which will allow the user to send a test email with their chosen template. Replacement tag values can also be added before sending.

This updates includes a new dependancy and requires a npm install

Improved 'Generate Content' accuracy

Further improvements to the accuracy of the text content which is generated from clicking the 'Generate Content' button.

Resizing of the HTML code editor

• Allowing resizing of the HTML code editor
• Subtle CTA styling changes
• Updated readme
• Code structure change

HTML syntax code input

Addition of an embedded HTML code editor for enabling syntax highlighting and line numbering.

Version checking

Upon each user session, check to see if there's a more recent version released in the Github repo. If so, then display a visual cue to the user that there's a more recent version the user can upgrade to.