Add doc for Unicode script built-in rules

src/grammars/built-ins.md

@@ -180,3 +180,181 @@ details.
 - `WHITE_SPACE`
 - `XID_CONTINUE`
 - `XID_START`
+
+
+### Script properties
+
+The [Unicode script property](https://unicode.org/standard/supported.html)
+has included built-in rules for matching characters in particular languages.
+
+**For example:**
+
+- `HAN` for matching characters in Chinese languages
+- `KATAKANA`, `HIRAGANA` for the Japanese language
+- `HANGUL` for the Korean language
+
+**All available rules:**
+
+- `ADLAM`
+- `AHOM`
+- `ANATOLIAN_HIEROGLYPHS`
+- `ARABIC`
+- `ARMENIAN`
+- `AVESTAN`
+- `BALINESE`
+- `BAMUM`
+- `BASSA_VAH`
+- `BATAK`
+- `BENGALI`
+- `BHAIKSUKI`
+- `BOPOMOFO`
+- `BRAHMI`
+- `BRAILLE`
+- `BUGINESE`
+- `BUHID`
+- `CANADIAN_ABORIGINAL`
+- `CARIAN`
+- `CAUCASIAN_ALBANIAN`
+- `CHAKMA`
+- `CHAM`
+- `CHEROKEE`
+- `CHORASMIAN`
+- `COMMON`
+- `COPTIC`
+- `CUNEIFORM`
+- `CYPRIOT`
+- `CYPRO_MINOAN`
+- `CYRILLIC`
+- `DESERET`
+- `DEVANAGARI`
+- `DIVES_AKURU`
+- `DOGRA`
+- `DUPLOYAN`
+- `EGYPTIAN_HIEROGLYPHS`
+- `ELBASAN`
+- `ELYMAIC`
+- `ETHIOPIC`
+- `GEORGIAN`
+- `GLAGOLITIC`
+- `GOTHIC`
+- `GRANTHA`
+- `GREEK`
+- `GUJARATI`
+- `GUNJALA_GONDI`
+- `GURMUKHI`
+- `HAN`
+- `HANGUL`
+- `HANIFI_ROHINGYA`
+- `HANUNOO`
+- `HATRAN`
+- `HEBREW`
+- `HIRAGANA`
+- `IMPERIAL_ARAMAIC`
+- `INHERITED`
+- `INSCRIPTIONAL_PAHLAVI`
+- `INSCRIPTIONAL_PARTHIAN`
+- `JAVANESE`
+- `KAITHI`
+- `KANNADA`
+- `KATAKANA`
+- `KAWI`
+- `KAYAH_LI`
+- `KHAROSHTHI`
+- `KHITAN_SMALL_SCRIPT`
+- `KHMER`
+- `KHOJKI`
+- `KHUDAWADI`
+- `LAO`
+- `LATIN`
+- `LEPCHA`
+- `LIMBU`
+- `LINEAR_A`
+- `LINEAR_B`
+- `LISU`
+- `LYCIAN`
+- `LYDIAN`
+- `MAHAJANI`
+- `MAKASAR`
+- `MALAYALAM`
+- `MANDAIC`
+- `MANICHAEAN`
+- `MARCHEN`
+- `MASARAM_GONDI`
+- `MEDEFAIDRIN`
+- `MEETEI_MAYEK`
+- `MENDE_KIKAKUI`
+- `MEROITIC_CURSIVE`
+- `MEROITIC_HIEROGLYPHS`
+- `MIAO`
+- `MODI`
+- `MONGOLIAN`
+- `MRO`
+- `MULTANI`
+- `MYANMAR`
+- `NABATAEAN`
+- `NAG_MUNDARI`
+- `NANDINAGARI`
+- `NEW_TAI_LUE`
+- `NEWA`
+- `NKO`
+- `NUSHU`
+- `NYIAKENG_PUACHUE_HMONG`
+- `OGHAM`
+- `OL_CHIKI`
+- `OLD_HUNGARIAN`
+- `OLD_ITALIC`
+- `OLD_NORTH_ARABIAN`
+- `OLD_PERMIC`
+- `OLD_PERSIAN`
+- `OLD_SOGDIAN`
+- `OLD_SOUTH_ARABIAN`
+- `OLD_TURKIC`
+- `OLD_UYGHUR`
+- `ORIYA`
+- `OSAGE`
+- `OSMANYA`
+- `PAHAWH_HMONG`
+- `PALMYRENE`
+- `PAU_CIN_HAU`
+- `PHAGS_PA`
+- `PHOENICIAN`
+- `PSALTER_PAHLAVI`
+- `REJANG`
+- `RUNIC`
+- `SAMARITAN`
+- `SAURASHTRA`
+- `SHARADA`
+- `SHAVIAN`
+- `SIDDHAM`
+- `SIGNWRITING`
+- `SINHALA`
+- `SOGDIAN`
+- `SORA_SOMPENG`
+- `SOYOMBO`
+- `SUNDANESE`
+- `SYLOTI_NAGRI`
+- `SYRIAC`
+- `TAGALOG`
+- `TAGBANWA`
+- `TAI_LE`
+- `TAI_THAM`
+- `TAI_VIET`
+- `TAKRI`
+- `TAMIL`
+- `TANGSA`
+- `TANGUT`
+- `TELUGU`
+- `THAANA`
+- `THAI`
+- `TIBETAN`
+- `TIFINAGH`
+- `TIRHUTA`
+- `TOTO`
+- `UGARITIC`
+- `VAI`
+- `VITHKUQI`
+- `WANCHO`
+- `WARANG_CITI`
+- `YEZIDI`
+- `YI`
+- `ZANABAZAR_SQUARE`