update: Add obsidian-completr

Usefull for callout completion

.obsidian/plugins/obsidian-completr/manifest.json

@@ -0,0 +1,10 @@
+{
+    "id": "obsidian-completr",
+    "name": "Completr",
+    "version": "3.2.0",
+    "minAppVersion": "1.0.0",
+    "description": "This plugin provides advanced auto-completion functionality for LaTeX, Frontmatter and standard writing.",
+    "author": "tth05",
+    "authorUrl": "https://github.com/tth05",
+    "isDesktopOnly": false
+}