Adds Purdue RCAC org member

- Adds logo for Purdue RCAC
- Adds functionality to provide card background for image
- Updates the org-members.yaml file with Purdue RCAC

Author: exoticDFT

_data/org-members.yaml

@@ -4,4 +4,12 @@
   acronym: "CRC"
   date_joined: 2024-10-10
   founding_member: true
-  tier: "Standard"
+  tier: "Standard"
+- name: "Rosen Center for Advanced Computing - Purdue"
+  url: https://www.rcac.purdue.edu/
+  figure: logo-rcac-purdue.png
+  acronym: "RCAC"
+  date_joined: 2024-10-30
+  founding_member: true
+  tier: "Basic"
+  background: rgba(0.0, 0.0, 0.0, 1.0)

_includes/org-member-card.html

@@ -1,7 +1,14 @@
-<div class="card d-flex text-center border-0 m-0">
-    <img class="card-img-top" 
+<div
+    class="card d-flex text-center border-0 m-0"
+    {% if item.background -%}
+    style="background-color: {{ item.background }}"
+    {%- endif -%}
+    >
+    <img class="card-img" 
         src="{{ site.baseurl }}/assets/img/org-logos/{{ item.figure }}"
         alt="{{ item.name }}{%-if item.acronym -%}&nbsp;({{ item.acronym }}){%- endif -%}"
     >
-    <a href="{{ item.url }}" class="stretched-link" target="_blank"></a>
+    <div class="card-img-overlay">
+        <a href="{{ item.url }}" class="stretched-link" target="_blank"></a>
+    </div>
 </div>