Centralize users list in group_vars and rename baseline playbook

Move the canonical user list to group_vars/all/users.yml so both
setup_linux.yml (renamed from initial_setup.yml) and the
initial_install users role consume the same source of truth.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

group_vars/all/users.yml

@@ -0,0 +1,22 @@
+---
+# Canonical user list — consumed by both setup_linux.yml and
+# initial_install/roles/users.
+users:
+  - name: automation
+    shell: /bin/bash
+    sudo_nopasswd: true
+    ssh_keys:
+      - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEx+ltCKNIEM7F4PzGLv22cIu7N0Fpn5gxwV02xq0GS9 automation@internet-master.cz"
+
+  - name: hellsos
+    shell: /bin/bash
+    sudo_nopasswd: true
+    ssh_keys:
+      - "ssh-rsa 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 hellsos@hellsos-PC"
+      - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKhfQt1VNQo8EbIog4yjU5VEF3mTyMEC7o1Qe95X4JwG jan@rabcan.cz"
+
+  - name: jim
+    shell: /bin/bash
+    sudo_nopasswd: true
+    ssh_keys:
+      - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPFS4fsqMjMMu/Bi/884bw7yJBqvWusDRESvanH6Owco jakub@jimbuntu"