add symlink helper

- symlinking is done often enough that it makes sense to have a helper
for it
- move appimage and archive helpers to use symlink helper
- fix formatting of air and alacritty

tasks/helpers/symlink.yml

@@ -0,0 +1,20 @@
+# vim: set filetype=yaml.ansible :
+#
+## Helper: symlink.yml
+## Description: symlink source to target
+## Variables:
+##   - from: the source of the symlink
+##   - to: path of the symlink
+##   - force: _optional_, force create the symlink
+---
+- name: Create symlinks
+  become: "{{ install_become }}"
+  become_user: "{{ install_become_user }}"
+  loop: "{{ links }}"
+  loop_control:
+    loop_var: link
+  ansible.builtin.file:
+    state: link
+    path: "{{ link.to }}"
+    src: "{{ link.from }}"
+    force: "{{ link.force | default(omit) }}"