Adding changes to immunization table for proper translation

[kassyray]

This pull request adds support for bilingual (English and French) immunization tables by introducing a lang parameter and updating table headers and messages to display in the appropriate language. It also makes minor adjustments to column widths and font sizes for better formatting.

Internationalization improvements:

• Added a lang parameter to the immunization-table function in conf.typ, enabling dynamic selection of English or French for table headers and footnotes. (templates/conf.typ)
• Updated header and footnote text in conf.typ to use language-specific variables, ensuring all displayed text matches the selected language. (templates/conf.typ) [1] [2]

Template updates:

• Modified en_template.py and fr_template.py to pass the correct language code ("en" or "fr") and font size to the immunization-table function, ensuring consistent rendering in both languages. (templates/en_template.py, templates/fr_template.py) [1] [2]

Formatting adjustments:

• Slightly increased the width of the first column in the immunization table for improved layout. (templates/conf.typ)