docs: add official The Pirate Ray branding

Import the project owner's transparent logo unchanged, feature it in the README, and document its provenance, checksum, and black-only opaque-background rule.

.gitattributes

@@ -1,7 +1,9 @@
 * text=auto
+.gitattributes text eol=lf
 *.md text eol=lf
 *.py text eol=lf
 *.json text eol=lf
 *.jsonl text eol=lf
 *.yaml text eol=lf
 *.yml text eol=lf
+*.png binary

README.md

@@ -1,4 +1,8 @@
-# The Pirate Ray
+<p align="center">
+  <img src="assets/branding/the-pirate-ray-logo.png" alt="The Pirate Ray logo" width="320">
+</p>
+
+<h1 align="center">The Pirate Ray</h1>
 
 The Pirate Ray is Makerspace Næstved's clean-room project for learning how to
 interoperate with its laser equipment and, over time, building a safe desktop

assets/branding/README.md

@@ -0,0 +1,19 @@
+# The Pirate Ray branding
+
+The official project name is **The Pirate Ray**.
+
+`the-pirate-ray-logo.png` is the original transparent project logo supplied by
+the project owner for use by this project. It is stored without resizing,
+re-encoding, or other modification.
+
+- Dimensions: 1254 x 1254 pixels
+- Format: 32-bit ARGB PNG
+- SHA-256: `afcd7e457b5bf9cf92a7222b3ab8a2850d75c05bc2c37d242c959cd7569e6fa4`
+
+Use the transparent original by default. If a derivative needs an opaque
+background, the background must be black. Do not use another background
+color.
+
+The repository does not yet have a project license. This directory records
+the asset's provenance and approved presentation; it does not independently
+grant broader rights or select a license.