Rename es24n/ to modules/

Update sys.path reference in es24n_conf.py and all documentation
to reflect the new folder name.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -23,7 +23,7 @@ No external dependencies — Python 3 standard library only. Compatible with Tru
 
 ```
 es24n_conf.py               ← Entry point and main menu (run this)
-es24n/
+modules/
     ui.py                   ← ANSI colours, display helpers, input prompts
     serial_port.py          ← SerialPort class (termios/fcntl/select, no pyserial)
     models.py               ← IOMConfig and ShelfConfig dataclasses
@@ -32,7 +32,7 @@ es24n/
     workflow_firmware.py    ← IOM and Fabric Card firmware update workflow
 ```
 
-`es24n_conf.py` adds `es24n/` to `sys.path` at startup so all inter-module imports work without a package structure.
+`es24n_conf.py` adds `modules/` to `sys.path` at startup so all inter-module imports work without a package structure.
 
 ## Workflows
 

README.md

@@ -68,7 +68,7 @@ Connects to each IOM directly over the network and updates IOM and/or Fabric Car
 
 ```
 es24n_conf.py               ← Entry point — run this
-es24n/
+modules/
     ui.py                   ← Display helpers and input prompts
     serial_port.py          ← Serial port driver (no pyserial required)
     models.py               ← IOMConfig and ShelfConfig data classes

es24n_conf.py

@@ -10,7 +10,7 @@ Compatible with TrueNAS (FreeBSD) and Linux.
 Usage:
     python3 es24n_conf.py
 
-All files in the es24n/ subdirectory must be present:
+All files in the modules/ subdirectory must be present:
     ui.py, serial_port.py, models.py, redfish.py,
     workflow_serial.py, workflow_firmware.py
 """
@@ -19,7 +19,7 @@ import os
 import sys
 import time
 
-sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "es24n"))
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "modules"))
 
 from ui import _c, C, banner, draw_box, ok, warn, prompt
 from workflow_firmware import firmware_update_workflow