reorganize code into smaller files & dirs

packages/app/src/Components/Textarea/Textarea.css

@@ -0,0 +1,73 @@
+.rta__autocomplete {
+  z-index: 99;
+}
+
+.rta__list {
+  border: none;
+}
+.rta__item:not(:last-child) {
+  border: none;
+}
+.rta__entity--selected .user-item,
+.rta__entity--selected .emoji-item {
+  text-decoration: none;
+  background: var(--gray-secondary);
+}
+
+.user-item,
+.emoji-item {
+  color: var(--font-color);
+  background: var(--gray-superdark);
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  font-size: 16px;
+  padding: 10px;
+}
+
+.user-item:hover,
+.emoji-item:hover {
+  background: var(--gray-tertiary);
+}
+
+.user-item .picture {
+  width: 30px;
+  height: 30px;
+  border-radius: 100%;
+}
+
+.user-picture {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin-right: 8px;
+}
+
+.user-picture .avatar {
+  border-width: 1px;
+  width: 40px;
+  height: 40px;
+}
+
+.user-details {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+}
+
+.user-item .nip05 {
+  font-size: var(--font-size-tiny);
+}
+
+.emoji-item {
+  font-size: var(--font-size-tiny);
+}
+
+.emoji-item .emoji {
+  margin-right: 0.2em;
+  min-width: 20px;
+}
+
+.emoji-item .emoji-name {
+  font-weight: bold;
+}