Merge pull request #2947 from flysand7/vendor-x11

[vendor/x11]: Add most of the basic xlib bindings

examples/all/all_vendor.odin

@@ -39,6 +39,8 @@ import nvg       "vendor:nanovg"
 import nvg_gl    "vendor:nanovg/gl"
 import fontstash "vendor:fontstash"
 
+import xlib       "vendor:x11/xlib"
+
 _ :: botan_bindings
 _ :: botan_blake2b
 _ :: keccak
@@ -76,4 +78,6 @@ _ :: lua_5_4
 
 _ :: nvg
 _ :: nvg_gl
-_ :: fontstash
+_ :: fontstash
+
+_ :: xlib