Model Context Protocol (MCP) support with new use case (#42)

* initial mcp

* food ordering with mcp

* prompt eng

* splitting out goals and updating docs

* a diff so I can get tests from codex

* a diff so I can get tests from codex

* oops, missing files

* tests, file formatting

* readme and setup updates

* setup.md link fixes

* readme change

* readme change

* readme change

* stripe food setup script

* single agent mode default

* prompt engineering for better multi agent performance

* performance should be greatly improved

* Update goals/finance.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update activities/tool_activities.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* co-pilot PR suggested this change, and now fixed it

* stronger wording around json format response

* formatting

* moved docs to dir

* moved image assets under docs

* cleanup env example, stripe guidance

* cleanup

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

tests/test_workflow_helpers.py

@@ -0,0 +1,36 @@
+import pytest
+
+from models.tool_definitions import (
+    AgentGoal,
+    MCPServerDefinition,
+    ToolArgument,
+    ToolDefinition,
+)
+from workflows.workflow_helpers import is_mcp_tool
+
+
+def make_goal(with_mcp: bool) -> AgentGoal:
+    tools = [ToolDefinition(name="AddToCart", description="", arguments=[])]
+    mcp_def = None
+    if with_mcp:
+        mcp_def = MCPServerDefinition(
+            name="stripe", command="python", args=["server.py"]
+        )
+    return AgentGoal(
+        id="g",
+        category_tag="test",
+        agent_name="Test",
+        agent_friendly_description="",
+        tools=tools,
+        mcp_server_definition=mcp_def,
+    )
+
+
+def test_is_mcp_tool_recognizes_native():
+    goal = make_goal(True)
+    assert not is_mcp_tool("AddToCart", goal)
+
+
+def test_is_mcp_tool_recognizes_mcp():
+    goal = make_goal(True)
+    assert is_mcp_tool("list_products", goal)