refactor(cli): avoid http reqs for sample configs

re #716

komorebic/build.rs

@@ -0,0 +1,8 @@
+fn main() {
+    if std::fs::metadata("applications.yaml").is_err() {
+        let applications_yaml = reqwest::blocking::get(
+        "https://raw.githubusercontent.com/LGUG2Z/komorebi-application-specific-configuration/master/applications.yaml"
+    ).unwrap().text().unwrap();
+        std::fs::write("applications.yaml", applications_yaml).unwrap();
+    }
+}