Add Entry Meta as PDF Conditional Logic Options

[jakejackson1]

Description

This PR adds a bunch of new condition options available for PDFs, such as:

• Entry ID
• Status
• Entry Date
• Starred
• IP Address
• Source URL
• Payment Status
• Payment Date
• Payment Amount
• Unique ID
• Additional entry meta data, like Quiz results or GravityView Approval status

Resolves #1404

Testing instructions

1. Reload a form with a bunch of entries which varies each of the above items
2. Setup PDFs on the form with unique conditional logic combinations
3. Verify the correct PDF is active for the entry

Screenshots

Checklist:

• I've tested the code.
• My code is easy to read, follow, and understand
• My code follows the accessibility standards.
• My code has proper inline documentation / docblocks.

Additional Comments

Props to the Gravity Wiz team for creating the original snippet this code is based on, and licensing it under GPLv2: https://github.com/gravitywiz/snippet-library/blob/master/gravity-forms/gw-conditional-logic-entry-meta.php

[codecov]

Codecov Report

Attention: Patch coverage is 94.20290% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 77.26%. Comparing base (692feee) to head (9fea008).

Files	Patch %	Lines
src/Helper/Helper_Data.php	94.01%	10 Missing ⚠️
src/Controller/Controller_Form_Settings.php	93.54%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           development    #1501      +/-   ##
===============================================
+ Coverage        76.99%   77.26%   +0.26%     
===============================================
  Files              243      243              
  Lines            12516    12716     +200     
  Branches           370      370              
===============================================
+ Hits              9637     9825     +188     
- Misses            2871     2883      +12     
  Partials             8        8              

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