chore(framework): Move feature flags related resources and cleanup (#8297)

**What**
cleanup and move the feature flag related resources to manage them.

It also include some refactoring around loading and registering the flag as well as not relying on the `glob` package anymore plus some reorganization of the code itself

FIXES FRMW-2625

packages/core/utils/src/common/index.ts

@@ -25,6 +25,7 @@ export * from "./get-set-difference"
 export * from "./graceful-shutdown-server"
 export * from "./group-by"
 export * from "./handle-postgres-database-error"
+export * from "./is-truthy"
 export * from "./is-big-number"
 export * from "./is-boolean"
 export * from "./is-date"

packages/core/utils/src/common/is-truthy.ts

@@ -0,0 +1,10 @@
+/**
+ * Return true if the value is truthy and otherwise false
+ * @param val
+ */
+export function isTruthy(val: string | boolean | undefined): boolean {
+  if (typeof val === "string") {
+    return val.toLowerCase() === "true"
+  }
+  return !!val
+}