[Feature Request] Add fontcolor tag prefix for conditional text color in Word templates

[tohmoh]

Summary
Add a fontcolor (or cellfg) tag prefix similar to the existing cellbg tag, allowing users to conditionally set font color within table cells in Word templates.

Problem
Currently, when using cellbg with a dark background color (e.g., black), the text becomes invisible because there is no way to change the font color to contrast with the background.

Example of current limitation:

{% cellbg finding.severity_color %}{{ finding.severity }}

When finding.severity_color is 000000 (black), the black text on a black background is unreadable.

Proposed Solution
A new fontcolor tag prefix that works like cellbg:

{% fontcolor "FFFFFF" if finding.severity == "Critical" else "000000" %}
{% cellbg finding.severity_color %}{{ finding.severity }}

This would allow users to set white text on dark backgrounds and maintain readability across all severity levels.

Use Case
Reporting templates that use severity-colored cell backgrounds need the ability to adjust text color for contrast and readability.

[chrismaddalena]

We can explore this idea, but it'd actually be an enhancement to docxtpl. The way forward will depend on the outcome of #822.

You can achieve conditional font color changes today using an if statement. For example:

{% cellbg finding.severity_color %}{% if finding.severity == "Critical" %}{{ finding.severity }}{% else %}{{ finding.severity }}{% endif %}

You would apply your font color the {{ finding.severity }} in the above statement. If the severity is "Critical" then the first {{ finding.severity }} would be used and apply it's formatting with your alternate font color.