Remove .obsidian/core-plugins.json state from repo

This state seems to change based on casual UI interactions. It
may need to be tracked in the future if we find it has more universal
functions across instances.

.gitignore

 # workspace changes are local to working dir so don't track
 .obsidian/workspace.json
+
+# seems to change due to UI interaction
+.obsidian/core-plugins.json

.obsidian/core-plugins.json

-[
-  "file-explorer",
-  "global-search",
-  "switcher",
-  "graph",
-  "backlink",
-  "canvas",
-  "outgoing-link",
-  "tag-pane",
-  "page-preview",
-  "daily-notes",
-  "templates",
-  "note-composer",
-  "command-palette",
-  "editor-status",
-  "bookmarks",
-  "outline",
-  "word-count",
-  "file-recovery"
-]
\ No newline at end of file