feat: Color Picker plugin (#12)

* feat: add color picker panel (WIP - render bug)

* docs: update README and add thumbnail

* fix: rgb and hex options label key

* fix: current swatch not loading on open

* Modify plugin.toml metadata for color picker

Updated plugin metadata fields including tags.

---------

Co-authored-by: Lemmy <studio@quadbyte.net>

color_picker/widget.luau

@@ -0,0 +1,26 @@
+-- Bar [[widget]] entry:
+-- Left Click: opens the panel,
+-- Right Click: picks a color directly
+-- and copies the hex to clipboard (no panel).
+
+local glyph = barWidget.getConfig("glyph")
+local tr_color_picker = noctalia.tr("color_picker");
+
+local function render()
+  barWidget.setGlyph(glyph)
+  barWidget.setTooltip(tr_color_picker)
+end
+
+function onClick()
+  noctalia.togglePanel("oldirtty/color_picker:panel")
+end
+
+function onRightClick()
+  noctalia.runAsync("noctalia msg plugin oldirtty/color_picker:service all pick", function(result)
+    if result.exitCode ~= 0 then
+      noctalia.notifyError(tr_color_picker, noctalia.tr("could_not_parse"))
+    end
+  end)
+end
+
+render()