v3.17.0: test scripts for the applet handoff - menu by text, spec-order TRs, codings

The applet-testing batch agreed after v3.15/3.16:

- menu-select by text: the step names the item by `text` (+ `mode`
  exact/contains, `case_sensitive`) instead of the install-dependent id
  (both or neither is refused); the runner resolves it against the card's
  cached menu and raises a step error naming the available items when nothing
  (or several items) matches.  The cache is refreshed on every SET UP MENU
  fetch - the proactive chain and the expect step - so an applet install (new
  items/ids after its REFRESH) no longer leaves a stale menu behind.  The
  step editor offers the id or the text + mode and the client-side pre-check
  bounds them.
- TERMINAL RESPONSE object order: both builders emitted the Item identifier
  before the Result (and the scripted builder its Text string before it too);
  TS 102 223 6.8.0 mandates Command details, Device identities, Result,
  Duration, Text string, Item identifier.  `testscript.build_tr` and
  `_menu_send_response` now follow it; `respond.raw` is documented as
  appended after the standard objects, and the exact-byte tests pin the order.
- Text codings: the scripted response codes the GSM default alphabet via the
  GSM 03.38 codec ('00' packed, '04' 8-bit) instead of latin-1, keeps '08'
  UCS2 and sends the spec's null text string for an empty answer; the packing
  helper is shared with the interactive path (`testscript.pack_gsm7`).  A
  UCS2 GET INPUT answer is documented and tested.
- docs/test-scripts.md gained the handoff brief for the applet agent: the
  value-collection table, fill-in worksheets for the two applet scenarios, a
  menu-by-text example, the validation checklist and a format stamp; help
  EN/RU and docs/api.md updated.

Tests: 809 frontend + 705 Python; sw cache simple-v380.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "3.16.0"
+version = "3.17.0"
 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.