Extract presence module and add SVG status icons

Move quick status buttons into dedicated presence.ts/css module with
Font Awesome SVG icons (briefcase, headphones, grill, beer mug,
screen-users). Bump version to 9.5.0.

client/src/presence.css

@@ -0,0 +1,27 @@
+.tapi-quick-btn {
+    border: 1px solid transparent;
+    cursor: pointer;
+    padding: 3px;
+    border-radius: 3px;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.tapi-quick-btn svg {
+    width: 16px;
+    height: 16px;
+    fill: #fff;
+}
+
+.tapi-btn-away {
+    background-color: #f0ad4e;
+}
+
+.tapi-btn-dnd {
+    background-color: #d9534f;
+}
+
+.tapi-btn-available {
+    background-color: #5cb85c;
+}