feat: Add decoding for ICE and PRESFR remarks

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

metar.html

@@ -272,7 +272,8 @@
                 'FROIN': 'Frontal passage in vicinity',
                 'CONTRAILS': 'Contrails observed',
                 'VIRGA': 'Virga (precipitation not reaching the ground)',
-                'HALO': 'Halo phenomenon observed'
+                'HALO': 'Halo phenomenon observed',
+                'PRESFR': 'Pressure falling rapidly'
             };
             const directions = {
                 'N': 'North', 'NE': 'Northeast', 'E': 'East', 'SE': 'Southeast',
@@ -353,6 +354,7 @@
                         if (p.length > 1 && p[1] === 'INTMT') {
                             return { consumed: 2, text: `  - ICE INTMT: Intermittent ice observed` };
                         }
+                        return { consumed: 1, text: `  - ICE: Ice observed` };
                     }
                 },
                 // DENSITY ALT