chore: import upstream snapshot with attribution

postgresql/help/table_form.html

@@ -0,0 +1,12 @@
+<header>Create Table</header>
+
+This form is for creating a new, empty table. You must enter a table
+name and one or more fields. For each field, you must enter a name, select a
+data type and enter the type width (if appropriate for the data type).
+You can also choose if the field is an multi-value array, if it allows null,
+if it is the primary key for indexing, and if the values it in must be unique.
+When done, click on the <tt>Create</tt> button to have the table immediately
+created. <p>
+
+<hr>
+