feat(Makefile): restructure Makefile into modular files for better organization and maintainability

feat(Makefile): introduce common.mk for shared variables and environment configuration
feat(Makefile): create web.mk for web frontend-related tasks
feat(Makefile): create launchpad.mk for internal launchpad deployment tasks
feat(Makefile): create mobile.mk for mobile app development tasks
feat(Makefile): create dataconnect.mk for Data Connect management tasks
feat(Makefile): create tools.mk for development tools like git hooks
feat(Makefile): remove admin-web specific tasks and files as the admin console is no longer actively maintained
feat(Makefile): update help command to reflect the new modular structure and available commands
feat(Makefile): remove base44 export workflow as it is no longer relevant
feat(Makefile): remove IAP configuration as it is no longer used
feat(Makefile): remove harness-related tasks as they are no longer relevant

The Makefile has been significantly refactored to improve organization and maintainability. The changes include:

- Modularization: The monolithic Makefile has been split into smaller, more manageable files, each responsible for a specific area of the project (web, launchpad, mobile, dataconnect, tools).
- Common Configuration: Shared variables and environment configuration are now centralized in common.mk.
- Removal of Unused Tasks: Tasks related to the admin console, base44 export workflow, IAP configuration, and API test harness have been removed as they are no longer relevant.
- Updated Help Command: The help command has been updated to reflect the new modular structure and available commands.
- Improved Readability: The modular structure makes the Makefile easier to read and understand.
- Maintainability: The modular structure makes it easier to maintain and update the Makefile.
- Scalability: The modular structure makes it easier to add new tasks and features to the Makefile.

makefiles/common.mk

@@ -0,0 +1,24 @@
+# --- Environment & Variables ---
+
+# Flutter check
+FLUTTER := $(shell which flutter)
+
+# Firebase & GCP Configuration
+GCP_DEV_PROJECT_ID     := krow-workforce-dev
+GCP_STAGING_PROJECT_ID := krow-workforce-staging
+
+# Environment Detection
+ENV ?= dev
+
+# Conditional Variables by Environment
+ifeq ($(ENV),staging)
+    GCP_PROJECT_ID := $(GCP_STAGING_PROJECT_ID)
+    FIREBASE_ALIAS := staging
+    HOSTING_TARGET := app-staging
+	SQL_TIER := db-n1-standard-1
+else
+    GCP_PROJECT_ID := $(GCP_DEV_PROJECT_ID)
+    FIREBASE_ALIAS := dev
+    HOSTING_TARGET := app-dev
+	SQL_TIER := db-g1-small
+endif