feat: add plus/minus icons

tool/src/aurora_iconset_builder/std_icons/components.py

@@ -26,6 +26,26 @@ def register(ctx: AuroraContext) -> None:
         ),
         build_triangle_icons,
     )
+    ctx.register(
+        "component/plus",
+        (
+            SvgSource("component", "plus.svg"),
+            TempArtSource("component", "generic-background.png"),
+            NewArtSource(),
+            TempArtSink("component", "plus.png"),
+        ),
+        build_plus_icon,
+    )
+    ctx.register(
+        "component/minus",
+        (
+            SvgSource("component", "minus.svg"),
+            TempArtSource("component", "generic-background.png"),
+            NewArtSource(),
+            TempArtSink("component", "minus.png"),
+        ),
+        build_minus_icon,
+    )
 
 
 def build_generic_background(
@@ -69,3 +89,35 @@ def build_triangle_icons(
     sink_down.push(env, tri_down)
     sink_right.push(env, tri_right)
     sink_up.push(env, tri_up)
+
+
+def build_plus_icon(
+    env: AuroraEnvironment,
+    plus_src: SvgSource,
+    bg_src: TempArtSource,
+    new_art: NewArtSource,
+    sink: TempArtSink,
+) -> None:
+    plus = plus_src.pull(env)
+    bg = bg_src.pull(env)
+
+    art = new_art.pull()
+    art.paste(bg, (0, 0), plus)
+
+    sink.push(env, art)
+
+
+def build_minus_icon(
+    env: AuroraEnvironment,
+    minus_src: SvgSource,
+    bg_src: TempArtSource,
+    new_art: NewArtSource,
+    sink: TempArtSink,
+) -> None:
+    minus = minus_src.pull(env)
+    bg = bg_src.pull(env)
+
+    art = new_art.pull()
+    art.paste(bg, (0, 0), minus)
+
+    sink.push(env, art)