Add emoji completions extension (#3941)

Seee README for (very) basic info. I wish I could implement this without
having a full-blown LSP, but I don't think that's the case.

---------

Co-authored-by: Finn Evers <[email protected]>

Author: ahockersten

.gitmodules

@@ -842,6 +842,10 @@
 	path = extensions/emmylua
 	url = https://github.com/EmmyLuaLs/Zed-EmmyLua.git
 
+[submodule "extensions/emoji-completions"]
+	path = extensions/emoji-completions
+	url = https://github.com/ahockersten/emoji-completions-zed.git
+
 [submodule "extensions/env"]
 	path = extensions/env
 	url = https://github.com/zarifpour/zed-env

extensions.toml

@@ -850,6 +850,10 @@ version = "0.0.8"
 submodule = "extensions/emmylua"
 version = "0.19.0"
 
+[emoji-completions]
+submodule = "extensions/emoji-completions"
+version = "1.0.3"
+
 [env]
 submodule = "extensions/env"
 version = "0.0.1"