Two Tangut ideographs

[eggrobin]

On top of #578.

https://github.com/unicode-org/sah/issues/555.

[UTC-181-C32] Consensus: Provisionally assign 2 code points U+18D1D TANGUT IDEOGRAPH-18D1D and U+18D1E TANGUT IDEOGRAPH-18D1E as described in L2/24-236. [Ref: 2.5 in L2/24-228]

[181-C60] Consensus: UTC accepts for encoding in Unicode Version 17.0 the following 297 Arabic, Bengali, Han, Kannada, Latin, Oriya, phonetic, Sharada, Tangut, Telugu, and symbol characters for which the code points have previously been provisionally assigned:

    Arabic (40 characters): 088F, FBC3..FBD2, FD90..FD91, FDC8..FDCE, 10EC5..10EC7, 10ED0..10ED8, 10EFA..10EFB
    Bengali (1 character): 09FF
    Han (5 characters): 16FF2..16FF6
    Kannada (1 character): 0CDC
    Latin (2 characters): A7D2, A7D4
    Oriya (2 characters): 0B53..0B54
    Phonetic (30 characters): 1ACF, 1AD0..1ADD, 1AE0..1AEB, A7CE..A7CF, A7F1
    Sharada (8 characters): 11B60..11B67
    Tangut (145 characters): 187F8..187FF, 18D09..18D1E, 18D80..18DF2
    Telugu (1 character): 0C5C
    Symbols (62 characters): 2B96, 1CCFA..1CCFC, 1CEBA..1CED0, 1CEE0..1CEF0, 1F777..1F77A, 1F8D0..1F8D8, 1FA54..1FA57, 1FBFA

• https://github.com/unicode-org/utc-release-management/issues/154