feat(ssh-launcher): add /ssh launcher for SSH config hosts (#138)

* feat(ssh-launcher): add /ssh launcher for SSH config hosts

Provide a launcher provider that reads ~/.ssh/config, lists host aliases
with fuzzy search, and opens an SSH session in the terminal on activate.

* docs(ssh-launcher): update store thumbnail

Replace the plugin card image with the final SSH Launcher artwork,
blur server IP addresses, and fix the displayed category tags.

* fix(ssh-launcher): parse SSH config directives case-insensitively

Match Host, Hostname, and User keywords regardless of casing so
lowercase blocks are included, consistent with OpenSSH behavior.

ssh-launcher/README.md

@@ -0,0 +1,40 @@
+# SSH Launcher
+
+![SSH Launcher thumbnail](thumbnail.webp)
+
+SSH Launcher lists hosts from your OpenSSH config and opens an SSH session in a
+terminal from the Noctalia launcher.
+
+## Plugin
+
+| Field | Value |
+| --- | --- |
+| ID | `cleboost/ssh-launcher` |
+| Entry | Launcher provider: `launcher` |
+| Launcher Prefix | `/ssh` |
+
+## Requirements
+
+Install [OpenSSH](https://www.openssh.com/) and ensure `ssh` is available on
+`PATH`.
+
+## Usage
+
+Open the Noctalia launcher and type `/ssh` to list hosts from your SSH config.
+Continue typing to filter by host alias, hostname, or user, then select one to
+open a terminal running `ssh <host>`.
+
+## Settings
+
+| Setting | Type | Default | Description |
+| --- | --- | --- | --- |
+| `config_path` | `file` | `~/.ssh/config` | Path to your SSH config file. |
+| `max_results` | `int` | `30` | Maximum number of hosts shown. |
+| `extra_args` | `string` | `""` | Extra arguments appended to every `ssh` command. |
+| `terminal` | `string` | `""` | Custom terminal command. Empty uses Noctalia's terminal discovery. |
+
+## Notes
+
+Hosts are read from simple `Host` entries in your SSH config. Wildcard patterns
+such as `Host *` or `Host *.example.com` are ignored. `Include` directives are
+not expanded in this version. The host list is cached for the launcher session.