Drops ie8 support (#79974)

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We currently transpile TGUI down into ie8. This was primarily for Linux
compatibility, which, to my understanding, hasn't worked for quite some
time. As we approach 2024, consider that ie8 is nearly 15 years old and
had its support ended in 2016. I believe sunsetting ie8 is in order.

>I have no objections to remove IE8 support and fully target IE11.

tgstation/tgstation#79943 (comment)

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- Probably improves performance to some degree, you're only as slow as
your weakest link.
- Reduced maintenance burden
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N/A if they can even see this message it doesn't affect them

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tgui/package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "tgui-workspace",
-  "version": "4.3.0",
+  "version": "4.4.0",
   "packageManager": "[email protected]",
   "workspaces": [
     "packages/*"

tgui/packages/tgui-bench/package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "tgui-bench",
-  "version": "4.3.0",
+  "version": "4.4.0",
   "dependencies": {
     "@fastify/static": "^6.12.0",
     "common": "workspace:*",

tgui/packages/tgui-dev-server/package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "tgui-dev-server",
-  "version": "4.3.0",
+  "version": "4.4.0",
   "type": "module",
   "dependencies": {
     "axios": "^1.7.9",