refactor: move the flow feature as library

Author: sheikalthaf

angular.json

@@ -89,6 +89,39 @@
           }
         }
       }
+    },
+    "flow": {
+      "projectType": "library",
+      "root": "projects/flow",
+      "sourceRoot": "projects/flow/src",
+      "prefix": "lib",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-angular:ng-packagr",
+          "options": {
+            "project": "projects/flow/ng-package.json"
+          },
+          "configurations": {
+            "production": {
+              "tsConfig": "projects/flow/tsconfig.lib.prod.json"
+            },
+            "development": {
+              "tsConfig": "projects/flow/tsconfig.lib.json"
+            }
+          },
+          "defaultConfiguration": "production"
+        },
+        "test": {
+          "builder": "@angular-devkit/build-angular:karma",
+          "options": {
+            "tsConfig": "projects/flow/tsconfig.spec.json",
+            "polyfills": [
+              "zone.js",
+              "zone.js/testing"
+            ]
+          }
+        }
+      }
     }
   },
   "cli": {

package.json

@@ -30,6 +30,7 @@
     "autoprefixer": "^10.4.15",
     "jest": "^29.7.0",
     "jest-preset-angular": "^13.1.2",
+    "ng-packagr": "^17.0.0",
     "postcss": "^8.4.28",
     "tailwindcss": "^3.3.3",
     "typescript": "~5.2.2"
@@ -38,6 +39,9 @@
     "preset": "jest-preset-angular",
     "setupFilesAfterEnv": [
       "<rootDir>/setup-jest.ts"
-    ]
+    ],
+    "moduleNameMapper": {
+      "^flow": "<rootDir>/projects/flow/src/public-api.ts"
+    }
   }
 }