v1.1.0 - reimplement UNIT; reorganize DATE, BASE; fix RPN stack handlinglift

• 1.1.0 (2025-10-07)
  • DATE (Major UI Change)
    • Support additional method of entry of Duration objects:
      • compact string form, {dd}D{hh}H{mm}M{ss}S, e.g. 1D30M2S for
        DR{1,0,30,2}.
        • Obsoletes the "Duration Colon Modifier" entry form
          {nn}:{modifier}. Currently retained for backwards
          compatibility.
      • incremental building of Duration components using the DAY>,
        HR>, MIN>, and SEC> menu functions
    • Add MenuFolder for the 7 Date types: D, T, DT, TZ, DZ, DR,
      DW
      • add convenience menu function that inserts the Date-type prefix
        (i.e. "D{", "T{", "DT{", "TZ{", "DZ{", "DR{", "DW{"), to make
        entering Date-objects much easier
      • add complete list of polymorphic functions that apply to each
        Date-object under each menu folder
    • Remove DOPS folder, and scatter its functions (LEAP, DSHK,
      DEXD, DCUT, DLNK) under the 3 Date-object folders which support
      them: D, DT, DZ
    • Assume that DT (DateTime) is always in UTC timezone whenever its
      timezone is needed in a calculation
  • HMS functions
    • New Add HMS+ and HMS- menu functions under CONV menu folder.
    • Bug Fix: Add normalization to >HMS conversion function to
      prevent bug that caused [1.32] [1.32] [HMS+] to return 3.0360
      instead of 3.04.
    • Validate mm and ss fields of hh.mmss and throw Err:Invalid if
      greater than than 60.
  • UNIT menu (Complete Reimplementation)
    • Reimplement the underlying architecture using a workflow similar to
      the UNITS menu of the HP-19BII and TI-85
      • Pressing a UNIT menu converts a Real number to a Denominate number
        (i.e. a number with units).
      • Pressing a subsequent UNIT menu converts that Denominate number
        into the unit requested by the menu key.
    • Support misc Unit Functions (UFCN)
      • UVAL: return display value without units
      • UBAS: convert to its "base unit"
    • Increase number of supported units from 30 to 169.
      • Support all units in the HP-19BII and the TI-85.
    • Reorganize UNIT menus across 13 sub MenuFolders: UFCN, LENG, AREA,
      VOL, TEMP, MASS, FORC, PRES, ENER, TIME, SPD, PWR, FUEL.
    • Support basic arithmetic operations on units: CHS, +, -, *,
      /
    • Support most NUM operations on units: %, %CH, IP, FP,
      FLR,CEIL, NEAR, ABS, SIGN, MOD, MIN, MAX, RNDF,
      RNDN, RNDG (i.e. all NUM functions except GCD, LCM, and PRIM)
    • Support Storage Register arithmetics with UNIT objects.
  • BASE (UI Reorganization)
    • move most menu functions under 5 new subfolders: LOGI, ROTS, BITS,
      BFCN, BCFS ("Configs" or "Carry Flag and Word Size")
    • rename (B+ B- B* B/) to (BAS+ BAS- BAS* BAS/) for better
      self-documentation
    • no functional change
  • RPN Stack (Bug Fixes)
    • Bug Fix: Fix incorrect stack lift behavior for functions that
      produce a value without consuming the X register (e.g. PI, E, MEAN).
      Previously, these functions would ignore the 'disable stack lift'
      setting. Now, they will correctly interpret that flag and overwrite
      the existing X register.
    • Bug Fix: Preserve LASTX during CLST (Clear Stack), consistent
      with HP-42S.
    • Bug Fix: Handle an empty string input buffer correctly for all
      commands including the 'disable stack lift' behavior.
    • Handle edge case of STO which consumes X but spits back the same
      value. Input termination must occur and stack lift must be enabled.
    • Terminate input buffer and correctly enable stack lift for stack
      manipulation commands: DUP, Rollup, Rolldown, DROP, X<>Y.
  • Input Termination (Consistency)
    • Update all functions and menu navigation to avoid input termination
      for as long as it makes sense. See the new Input
      Termination section for
      full details.
  • Key bindings (New)
    • Add 2ND v as a shortcut to UVAL menu function under UNIT. Allows
      quick extraction of the value part of a Denominate object.
  • SHOW (Workflow)
    • Pass along most button keys to the main command processor so that
      their normal function are directly invoked from SHOW mode. Previously,
      all button presses were consumed by the SHOW mode. So to enter a new
      number from SHOW mode, the digit key (0-9) had to be pressed twice.
    • Preserve previous behavior for 4 buttons: DEL, CLEAR, ENTER,
      ON/EXIT. These buttons are consumed by the SHOW mode, and simply
      cause the SHOW mode to exit back to the normal mode. The user must
      press these buttons again in normal mode to invoke their normal
      function.
  • RPN83P application size
    • increase to 64kiB (4 flash pages) from 48kiB
  • WARNING Most MODE settings will be lost when upgrading from v1.0 to
    v1.1. Variables and registers will be preserved.
    • Lost
      • Pending entry in the input buffer
      • FIX, SCI, ENG selection
      • Trig modes (DEG, RAD)
      • Complex result (CRES,RRES)
      • Complex display modes (RECT, PRAD, PDEG)
      • ,EE or EE, selection
      • {..} or ".." selection
      • 'BASE > DEC|BIN|OCT|HEX' selection
      • 'BASE > WSIZ' selection
      • 'BASE > CF' flag
      • 'DATE > EPCH' selection and custom epoch date
      • 'DATE > CLK > ATZ' application timezone
      • 'DATE > CLK > CTZ' clock timezone
      • TVM Solver parameters: IYR1, IYR2, TMAX
    • Preserved
      • Storage registers (R00-R99)
      • Storage variables (A-Z,Theta)
      • RPN stack registers (X,Y,Z,T,A,B,C,D)
      • STAT registers (ΣX to ΣYLX)
      • TVM variables: N, I%YR, PV, PMT, FV, P/YR, C/YR, BEG, END