feat(noctalia): add knowledge lookup panel

Provide a portable, cache-ignored Obsidian vault lookup plugin and bind it to Super+N.

.local/share/noctalia/plugins/knowledge-lookup/plugin.toml

@@ -0,0 +1,52 @@
+id = "alex/knowledge-lookup"
+name = "Knowledge Lookup"
+version = "1.0.0"
+plugin_api = 24
+author = "alex"
+license = "MIT"
+dependencies = []
+tags = ["productivity", "knowledge"]
+icon = "notes"
+description = "Search and preview a local Obsidian knowledge vault from the bar."
+
+[[setting]]
+key = "vault_path"
+type = "folder"
+label_key = "Knowledge vault directory"
+description_key = "Directory containing the Markdown vault to browse"
+default = ""
+
+[[widget]]
+id = "bar"
+entry = "widget.luau"
+
+[[panel]]
+id = "panel"
+entry = "panel.luau"
+width = 1100
+height = 720
+placement = "floating"
+position = "center"
+keyboard_focus = "exclusive"
+dismiss_on_outside_click = true
+capture_keys = [
+  "j",
+  "k",
+  "h",
+  "l",
+  "ctrl+U0063",
+  "ctrl+U0061",
+  "ctrl+U006e",
+  "g",
+  "shift+U0047",
+  "q",
+  "o",
+  "r",
+  "x",
+  "p",
+  "d",
+  "y",
+  "n",
+  "slash",
+  "enter",
+]