feat(material/card): add title-text-color token

Fixes angular#31080

Author: pmpak

src/material/card/_m2-card.scss

@@ -20,6 +20,7 @@
     card-outlined-container-color: inspection.get-theme-color($theme, background, card),
     card-outlined-container-elevation: elevation.get-box-shadow(0),
     card-outlined-outline-color: rgba(inspection.get-theme-color($theme, foreground, base), 0.12),
+    card-title-text-color: inspection.get-theme-color($theme, foreground, text),
     card-subtitle-text-color: inspection.get-theme-color($theme, foreground, secondary-text),
     card-filled-container-color: inspection.get-theme-color($theme, background, card),
     card-filled-container-elevation: elevation.get-box-shadow(0)

src/material/card/_m3-card.scss

@@ -25,6 +25,7 @@ $prefix: (mat, card);
       card-outlined-container-elevation: elevation.get-box-shadow(map.get($system, level0)),
       card-outlined-outline-color: map.get($system, outline-variant),
       card-subtitle-text-color: map.get($system, on-surface),
+      card-title-text-color: map.get($system, on-surface),
     ),
     typography: (
       card-subtitle-text-font: map.get($system, title-medium-font),

src/material/card/card.scss

@@ -91,6 +91,7 @@ $fallbacks: m3-card.get-tokens();
 
 // Add slots for custom Angular Material card tokens.
 .mat-mdc-card-title {
+  color: token-utils.slot(card-title-text-color, $fallbacks);
   font-family: token-utils.slot(card-title-text-font, $fallbacks);
   line-height: token-utils.slot(card-title-text-line-height, $fallbacks);
   font-size: token-utils.slot(card-title-text-size, $fallbacks);