feat(float): add fclose command

src/nvim/ex_cmds.lua

@@ -1044,6 +1044,12 @@ module.cmds = {
     addr_type='ADDR_NONE',
     func='ex_function',
   },
+  {
+    command='fclose',
+    flags=bit.bor(BANG, RANGE),
+    addr_type='ADDR_OTHER',
+    func='ex_floatclose',
+  },
   {
     command='global',
     flags=bit.bor(RANGE, WHOLEFOLD, BANG, EXTRA, DFLALL, SBOXOK, CMDWIN, LOCK_OK),