feat(canopy-typst): bundle Montserrat TTF in rulesets/georgia/notices/fonts/

Source: typst-document-generation plan Potential Improvements.

The Georgia notice templates reference Montserrat as their primary typeface, but the TTF files are not yet committed to rulesets/georgia/notices/fonts/. The render engine degrades gracefully to a fallback font, but production deployments need the actual Montserrat font files for visual fidelity.

Acceptance: Montserrat TTF subset (Regular + Bold + Italic at minimum) committed under rulesets/georgia/notices/fonts/; license confirmed (Montserrat is OFL); render integration test verifies the font is picked up.