feat: Add `get_all_projects` tool to list Jira projects and introduce a…

feat: Add `get_all_projects` tool to list Jira projects and introduce a comprehensive README for server documentation.

jira_mcp_server.py

@@ -169,6 +169,22 @@ def search_issues(jql_query: str) -> str:
     except Exception as e:
         return f"Error searching issues: {str(e)}"
 
+@mcp.tool()
+def get_all_projects() -> str:
+    """Fetches a list of all Jira projects available to the authenticated user."""
+    jira = _get_jira()
+    try:
+        projects = jira.projects()
+        if not projects:
+            return "No projects found."
+            
+        result = [f"Found {len(projects)} projects:"]
+        for project in projects:
+            result.append(f"- {project.name} (Key: {project.key})")
+        return "\n".join(result)
+    except Exception as e:
+        return f"Error fetching projects: {str(e)}"
+
 if __name__ == "__main__":
     # Start the FastMCP server
     mcp.run()