feat(nvim): add obsidian plugin

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

dots/.config/nvim/after/plugin/obsidian-nvim.lua

@@ -0,0 +1,9 @@
+require("obsidian").setup({
+  legacy_commands = false,
+  workspaces = {
+    {
+      name = "test",
+      path = "~/zk/work",
+    },
+  },
+})