feat(pstack): add plugin logo (#303)

* feat(pstack): reference plugin logo and bump to 0.14.7

Add "logo": "assets/logo.png" to the pstack manifest, matching the
relative-path style used by google-calendar and thermos, and bump the
patch version 0.14.6 -> 0.14.7.

The pstack/assets/logo.png file itself is added in a follow-up commit;
the image attachment did not reach the agent VM in this run.

Co-authored-by: lauren <poteto@users.noreply.github.com>

* feat(pstack): add plugin logo.png

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

pstack/.cursor-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
 	"name": "pstack",
 	"displayName": "pstack",
-	"version": "0.14.6",
+	"version": "0.14.7",
 	"description": "if you want to go fast, go deep first. pstack helps you write less, but higher quality code. rigorous agent workflows you can parallelize with confidence.",
 	"author": {
 		"name": "Lauren Tan"
@@ -9,6 +9,7 @@
 	"homepage": "https://github.com/cursor/plugins/tree/main/pstack",
 	"repository": "https://github.com/cursor/plugins",
 	"license": "MIT",
+	"logo": "assets/logo.png",
 	"keywords": [
 		"pstack",
 		"poteto-mode",