rename OTAMan → SIMple (v2.3.0)

- package pysim_otaman_server → pysim_simple_server; distribution and
  console script pysim-otaman-server → pysim-simple-server
- PWA branding SIMple: title, header, manifest, help EN/RU, GitHub links
- localStorage keys otaman_* → simple_* (clean break, no migration)
- export filenames simple-cards.json / simple-custom-files.json
- service worker cache simple-v189
- README/docs/setup/start scripts updated; no 'otaman' left in the tree

tests/test_fastinit.py

@@ -15,8 +15,8 @@ if str(PY_SIM) not in sys.path:
 from pySim.exceptions import SwMatchError
 from pySim.ts_102_221 import CardProfileUICC
 
-import pysim_otaman_server.fastinit as fastinit
-from pysim_otaman_server.fastinit import (
+import pysim_simple_server.fastinit as fastinit
+from pysim_simple_server.fastinit import (
     FastRuntimeState,
     do_reset_fast,
     pick_profile_no_reset,