Add link to coder.com/docs styling options documentation in thestyling parameter description to help users understand available styling attributes.

This addresses the need for users to easily find documentation about what styling options are available for thestyling parameter incoder_parameter data source.

The link points to the comprehensive styling options documentation that explains:

• disabled - for all parameter/form types
• placeholder - for string params with input/textarea forms
• mask_input - for string/number params with input/textarea forms

Tested: Documentation link is valid and points to the correct section.