move a lot of configuration around

tasks/build/alacritty.yml

@@ -1,15 +0,0 @@
-# vim: set filetype=yaml.ansible :
----
-- name: Build and install alacritty
-  become: true
-  ansible.builtin.command:
-    creates: "{{ pkgconfig_alacritty.install_prefix }}/bin/alacritty"
-    cmd:
-      - cargo
-      - install
-      - --root
-      - "{{ pkgconfig_alacritty.install_prefix }}"
-      - --git
-      - "{{ pkgconfig_alacritty.git_repo }}"
-      - --tag
-      - "v{{ pkgconfig_alacritty.version }}"