chore: Update Gitea host and Zinit client dependency

- Updated the Gitea host URL in `.roo/mcp.json` and `Cargo.toml`
  to reflect the change from `git.ourworld.tf` to `git.threefold.info`.
- Updated the `zinit-client` dependency in `Cargo.toml` to version
  `0.3.0`.  This ensures compatibility with the updated repository.
- Updated file paths in example files to reflect the new repository URL.

.roo/mcp.json

@@ -3,12 +3,15 @@
     "gitea": {
       "command": "/Users/despiegk/hero/bin/mcpgitea",
       "args": [
-        "-t", "stdio",
-        "--host", "https://gitea.com",
-        "--token", "5bd13c898368a2edbfcef43f898a34857b51b37a"
+        "-t",
+        "stdio",
+        "--host",
+        "https://gitea.com",
+        "--token",
+        "5bd13c898368a2edbfcef43f898a34857b51b37a"
       ],
       "env": {
-        "GITEA_HOST": "https://git.ourworld.tf/",
+        "GITEA_HOST": "https://git.threefold.info/",
         "GITEA_ACCESS_TOKEN": "5bd13c898368a2edbfcef43f898a34857b51b37a"
       }
     }