feat: update search placeholder to surface hotkey (#18294)

Author: miketheman

warehouse/locale/messages.pot

@@ -1239,10 +1239,8 @@ msgstr ""
 msgid "Search PyPI"
 msgstr ""
 
-#: warehouse/templates/base.html:257 warehouse/templates/base.html:289
-#: warehouse/templates/error-base-with-search.html:13
-#: warehouse/templates/index.html:35
-msgid "Search projects"
+#: warehouse/templates/base.html:257 warehouse/templates/index.html:35
+msgid "Type '/' to search projects"
 msgstr ""
 
 #: warehouse/templates/base.html:268 warehouse/templates/base.html:297
@@ -1251,6 +1249,11 @@ msgstr ""
 msgid "Search"
 msgstr ""
 
+#: warehouse/templates/base.html:289
+#: warehouse/templates/error-base-with-search.html:13
+msgid "Search projects"
+msgstr ""
+
 #: warehouse/templates/base.html:315
 msgid "Help navigation"
 msgstr ""

warehouse/templates/base.html

@@ -254,7 +254,7 @@
                    class="search-form__search"
                    type="text"
                    name="q"
-                   placeholder="{% trans %}Search projects{% endtrans %}"
+                   placeholder="{% trans %}Type '/' to search projects{% endtrans %}"
                    value="{{ term }}"
                    autocomplete="off"
                    autocapitalize="off"

warehouse/templates/index.html

@@ -32,7 +32,7 @@ <h1 class="homepage-banner__title">{{ banner }}</h1>
                class="search-form__search large-input"
                type="text"
                name="q"
-               placeholder="{% trans %}Search projects{% endtrans %}"
+               placeholder="{% trans %}Type '/' to search projects{% endtrans %}"
                autocomplete="off"
                autocapitalize="off"
                spellcheck="false"