pkg install, add link if package no have scripts

assets/var/gnu/icu.md

@@ -0,0 +1,14 @@
+icu
+=
+https://github.com/unicode-org/icu/archive/refs/tags/release-78.3.tar.gz
+
+``` sh *** build ***
+cd icu4c/source
+./configure --prefix="$pkgpath" \
+    --enable-shared \
+    --enable-static \
+    --disable-samples \
+    --disable-tests
+make -j"$(nproc)"
+make install
+```