refactor: run IWYU on entire repo

Reference: https://github.com/neovim/neovim/issues/6371.

src/nvim/lua/executor.c

@@ -13,7 +13,6 @@
 #include "klib/kvec.h"
 #include "luv/luv.h"
 #include "nvim/api/extmark.h"
-#include "nvim/api/private/defs.h"
 #include "nvim/api/private/helpers.h"
 #include "nvim/ascii_defs.h"
 #include "nvim/buffer_defs.h"
@@ -24,10 +23,9 @@
 #include "nvim/eval.h"
 #include "nvim/eval/funcs.h"
 #include "nvim/eval/typval.h"
-#include "nvim/eval/typval_defs.h"
 #include "nvim/eval/userfunc.h"
-#include "nvim/event/defs.h"
 #include "nvim/event/loop.h"
+#include "nvim/event/multiqueue.h"
 #include "nvim/event/time.h"
 #include "nvim/ex_cmds.h"
 #include "nvim/ex_cmds_defs.h"

src/nvim/lua/executor.h

@@ -4,18 +4,13 @@
 #include <lua.h>
 #include <stdbool.h>
 
-#include "nvim/api/private/defs.h"
 #include "nvim/api/private/helpers.h"
-#include "nvim/assert_defs.h"
-#include "nvim/cmdexpand_defs.h"
-#include "nvim/eval/typval_defs.h"
-#include "nvim/ex_cmds_defs.h"
+#include "nvim/cmdexpand_defs.h"  // IWYU pragma: keep
+#include "nvim/ex_cmds_defs.h"  // IWYU pragma: keep
 #include "nvim/func_attr.h"
-#include "nvim/lua/converter.h"
 #include "nvim/macros_defs.h"
-#include "nvim/map_defs.h"
 #include "nvim/types_defs.h"
-#include "nvim/usercmd.h"
+#include "nvim/usercmd.h"  // IWYU pragma: keep
 
 // Generated by msgpack-gen.lua
 void nlua_add_api_functions(lua_State *lstate) REAL_FATTR_NONNULL_ALL;

src/nvim/lua/stdlib.c

@@ -6,7 +6,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
-#include <sys/types.h>
+#include <uv.h>
 
 #ifdef NVIM_VENDOR_BIT
 # include "bit.h"
@@ -14,7 +14,6 @@
 
 #include "cjson/lua_cjson.h"
 #include "mpack/lmpack.h"
-#include "nvim/api/private/defs.h"
 #include "nvim/api/private/helpers.h"
 #include "nvim/ascii_defs.h"
 #include "nvim/buffer_defs.h"

src/nvim/lua/xdiff.c

@@ -5,7 +5,6 @@
 #include <string.h>
 
 #include "luaconf.h"
-#include "nvim/api/private/defs.h"
 #include "nvim/api/private/helpers.h"
 #include "nvim/linematch.h"
 #include "nvim/lua/converter.h"