docs: fix version compatibility (PWA vs server majors), broaden descriptions, drop the header slogan (v2.3.1)

- version check in pysimConnect() now compares the server major against
  SIMPLE_VERSION (2.3.1) instead of the hardcoded 1.x assumption; the header
  version is rendered from the same constant
- removed the 'SIM OTA with a Human Face' slogan (span, i18n key, translate
  hook) to free header space
- broaden the PWA description in manifest.json/package.json and the help
  overview (EN/RU): APDU workbench, OTA lab, CAT/STK simulator, card profiler
- version compatibility tables in README/RUS, help EN/RU and docs/api.md now
  describe the major-version rule
- README/RUS: Cards promoted to a top-level section; EN duplicate
  Theme/Localisation sections removed
- docs: /api/cardinfo documented; SCP81 'expose framing options' next-work
  item dropped (done); local AGENTS.md not-implemented note corrected
- SW cache simple-v190

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "2.3.0"
+version = "2.3.1"
 description = "HTTP REST server wrapping pysim for the SIMple PWA"
 requires-python = ">=3.8"
 # pysim is a git-only dependency installed explicitly by setup.bat/setup.sh.