docs: standardize readme format

readme.md

@@ -1,13 +1,34 @@
-# Overview
+# Ansible Role: Semaphore
 
-This role configures [SemaphoreUI](<https://semaphoreui.com/>) server, for reasons.
+Install and configure [Semaphore UI](https://semaphoreui.com/) - a modern UI for Ansible.
 
-## Supported Operating Systems
+## Variables
 
-| Operating System | Version |
-| --- | ----- |
-| Debian | 13 |
+| Variable | Required | Default | Description |
+|----------|----------|---------|-------------|
+| `mitogen_version` | No | `0.3.45` | Mitogen version to install |
+| `semaphore_admin_username` | No | `admin` | Admin username |
+| `semaphore_admin_password` | Yes | `admin` | Admin password |
+| `semaphore_admin_name` | No | `Administrator` | Admin display name |
+| `semaphore_admin_email` | No | `admin@example.com` | Admin email |
+| `semaphore_runner_token` | Yes | `runner-token` | Runner authentication token |
+| `semaphore_email_sender` | No | `semaphore@example.com` | Email sender address |
+| `semaphore_email_host` | No | `smtp` | SMTP host |
+| `semaphore_email_port` | No | `465` | SMTP port |
+| `semaphore_email_username` | No | `smtp-user` | SMTP username |
+| `semaphore_email_password` | Yes | `smtp-pass` | SMTP password |
+| `semaphore_ansible_ssh_key` | Yes | - | Ansible SSH private key |
+| `semaphore_ssh_config` | No | - | SSH config content |
 
-## Tags
+## Example
 
-This role has no tags.
+```yaml
+mitogen_version: "0.3.45"
+semaphore_admin_username: "admin"
+semaphore_admin_password: "secure_password"
+semaphore_admin_email: "admin@example.com"
+semaphore_runner_token: "secure-runner-token"
+semaphore_email_host: "smtp.example.com"
+semaphore_email_password: "smtp_password"
+semaphore_ansible_ssh_key: "{{ vault_ansible_ssh_key }}"
+```