Restructuring of 'signs' files and addition of old signs files

.gitignore

@@ -5,3 +5,4 @@
 *.fdb_latexmk
 *.synctex.gz
 *.fls
+.DS_Store

2025/signs/.gitignore

@@ -0,0 +1 @@
+.DS_STORE

README.md

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+README file for bornhack/assets repository
+
+# Bornhack assets
+
+Repository to store and organize digital and printed assets, like stickers and signs.
+
+## Structure
+
+Assets are organized depending on general usage or year-specific.
+Furthermore, assets are divided into folders for each relevant team and subject.
+
+For example, team Sanitation has both general and yearly signs:
+
+```
+.
+└── assets/
+    ├── generic/
+    │   └── signs/
+    │       └── sanitation/
+    │           ├── toilets/
+    │           │   ├── signs
+    │           │   └── resources (icons, images, etc.)
+    │           └── trash/
+    │               ├── signs
+    │               └── resources (icons, images, etc.)
+    └── year/
+        └── signs/
+            └── sanitation/
+                ├── signs
+                └── resources (icons, images, etc.)
+```
+
+## FYI
+
+This is just quickly thrown together, so people can make sense of the repo :)
+-Looking forward to seeing others contributions!🥰