Split core into two, fix python3 nvim dep

.install/archival.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -e
+source ./.versions
+
+echo
+echo "Installing archival tools..."
+echo
+
+apk add --no-cache \
+	unzip \
+	zip \
+	tar \
+	xz
+

.install/core.sh

@@ -12,9 +12,4 @@ apk add --no-cache \
 	nano \
 	curl \
 	wget \
-	openssh-client \
-	unzip \
-	zip \
-	tar \
-	xz
-
+	openssh-client

.install/neovim.sh

@@ -18,7 +18,8 @@ apk add --no-cache --virtual .build-deps \
 	libtool \
 	unibilium-dev \
 	libtermkey-dev \
-	libvterm-dev
+	libvterm-dev \
+	python3
 
 git clone https://github.com/neovim/neovim.git
 cd neovim