Switches vscode dmi editor to new one. (#66834)

https://marketplace.visualstudio.com/items?itemName=anturk.dmi-editor

.vscode/extensions.json

@@ -6,6 +6,7 @@
 		"arcanis.vscode-zipfs",
 		"dbaeumer.vscode-eslint",
 		"stylemistake.auto-comment-blocks",
-		"Donkie.vscode-tgstation-test-adapter"
+		"Donkie.vscode-tgstation-test-adapter",
+		"anturk.dmi-editor"
 	]
 }

.vscode/settings.json

@@ -12,9 +12,6 @@
 	"editor.codeActionsOnSave": {
 		"source.fixAll.eslint": true
 	},
-	"workbench.editorAssociations": {
-		"*.dmi": "imagePreview.previewEditor"
-	},
 	"files.eol": "\n",
 	"files.insertFinalNewline": true,
 	"gitlens.advanced.blame.customArguments": ["-w"],