refactor(server/utils): isMac/isWin - replace fn with boolean

those values cannot change during runtime,
=> there is no need to have these checks
as dynamic function, instead just
export the boolean value directly

src/services/utils.ts

@@ -321,11 +321,9 @@ export function getResourceDir() {
     }
 }
 
-export function isMac() {
-    return process.platform === "darwin";
-}
+export const isMac = process.platform === "darwin";
 
-export function isWindows() {
+export const isWindows = process.platform === "win32";
     return process.platform === "win32";
 }