added notes to settings.yaml

moved core app config (name, version) out of settings and into app/app_settings.py
added ability to brand SneakyScope to any name
added caching of cert information from crt.sh (cache enable and lenght is configurable in settings.yaml)

streamlined header/footer loading to be more correct

app/app_settings.py

@@ -0,0 +1,13 @@
+from dataclasses import dataclass
+from datetime import datetime
+
+this_year = datetime.strftime(datetime.now(),"%Y")
+
+@dataclass
+class AppSettings:
+    name: str = "SneakyScope"
+    tagline: str = "A selfhosted URL Sandbox"
+    url: str = "https://git.sneakygeek.net/ptarrant/SneakyScope"
+    copyright: str = f"© 2025 - {this_year}"
+    version_major: int = 1
+    version_minor: int = 0