ci: install graph-compose-emoji before building the examples module

The examples module depends on io.github.demchaav:graph-compose-emoji:1.0.0,
a standalone artifact (like graph-compose-fonts) that is not on Maven
Central. The Examples Generation Smoke Test job installed fonts and the
root artifact but not emoji, so "Compile examples module" failed to resolve
the dependency. Install the emoji module into the local repo first, exactly
as fonts already is.

Author: DemchaAV

.github/workflows/ci.yml

@@ -105,6 +105,12 @@ jobs:
         # install graph-compose-fonts into the local repo before building them.
         run: ./mvnw -B -ntp -f fonts/pom.xml -DskipTests install
 
+      - name: Install graph-compose-emoji (consumed by the examples module)
+        # The emoji example renders colour emoji from the bundled Noto SVG set;
+        # like graph-compose-fonts it is a standalone artifact not on Maven
+        # Central, so install it into the local repo before building examples.
+        run: ./mvnw -B -ntp -f emoji/pom.xml -DskipTests install
+
       - name: Install root artifact
         run: ./mvnw -B -ntp -DskipTests install -pl .