Added tags, createdAt, updatedAt properties (#561)

* add new properties on submit theme

* New GitHub Action for updating `updatedAt`

* change rebuild_themes.py to update tags for color themes

* Adding GitHub Action for updating all theme.json files (temporary)

* Applying corrected themes.json file

* fix: forgot to commit changes

* Update theme.json metadata

* Deleting actions not needed for merge

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

scripts/update_theme_date.py

@@ -0,0 +1,41 @@
+import json
+import time
+import os
+import sys
+
+
+def panic(message: str):
+    print(message, file=sys.stderr)
+    exit(1)
+
+
+def update_theme_date(theme_path):
+    theme_file = os.path.join(theme_path, "theme.json")
+
+    if not os.path.exists(theme_file):
+        panic(f"{theme_file} not found.")
+
+    # Load the theme JSON data
+    with open(theme_file, "r") as f:
+        try:
+            theme_data = json.load(f)
+        except json.JSONDecodeError as e:
+            panic("Error reading theme.json: " + str(e))
+
+    # Update the `updatedAt` field to the current date
+    theme_data["updatedAt"] = time.strftime("%Y-%m-%d")
+
+    # Write the changes back to theme.json
+    with open(theme_file, "w") as f:
+        json.dump(theme_data, f, indent=2)
+
+    print(f"Updated `updatedAt` for {theme_path} to {theme_data['updatedAt']}")
+
+
+if __name__ == "__main__":
+    # Make sure the script is run with the theme path as an argument
+    if len(sys.argv) != 2:
+        panic("Usage: update_theme_date.py <path_to_theme_directory>")
+
+    theme_path = sys.argv[1]
+    update_theme_date(theme_path)