fix: multiple minor fixes (#198, #188, #190)

- https://github.com/cupcakearmy/cryptgeon/issues/198: Replace abandoned license-checker with license-checker-evergreen
- https://github.com/cupcakearmy/cryptgeon/issues/188: Fix Polish locale number formatting by using {n} instead of # in ICU plural forms
- https://github.com/cupcakearmy/cryptgeon/issues/190: Add THEME_HOME_LINK env var to conditionally hide the /home link (defaults to true)
- Fix Rust 2024 never-type-fallback compatibility in store.rs

packages/backend/src/config.rs

@@ -70,4 +70,8 @@ lazy_static! {
         .unwrap_or("true".to_string())
         .parse()
         .unwrap();
+    pub static ref THEME_HOME_LINK: bool = std::env::var("THEME_HOME_LINK")
+        .unwrap_or("true".to_string())
+        .parse()
+        .unwrap();
 }