Add Azure Connector Namespaces canvas extension 🤖🤖🤖 (#2250)

* Add MCP Connectors (connector-namespaces) canvas extension

A Copilot CLI canvas extension for browsing and adding MCP connectors
from an Azure Connector Namespace into a Copilot session. Sign-in is
dependency-free (OAuth 2.0 auth-code + PKCE via the Azure CLI public
client, loopback redirect); network access is restricted to the public
Azure Resource Manager endpoint. MIT licensed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update Connector Namespaces canvas extension

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Harden Connector Namespaces canvas extension

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Sanitize connector icon brand colors

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add Connector Namespace playground actions

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Replace sandbox skill with native tool

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Clarify connector disconnect action

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Color disconnect action red

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Add connector extension plugin manifest

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Address connector canvas review feedback

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Remove legacy connector canvas manifest

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Address remaining connector review feedback

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Harden connector review fixes

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Harden connector convergence

Address the latest connector review batch across config persistence, executable trust, reauthentication, JSON-RPC transport, smoke safety, and accessibility.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Use native HTTP connector configs

Persist Connector Namespace MCP servers as direct HTTPS entries with API-key headers, remove the stdio unwrap proxy, and exercise the native Streamable HTTP path in smoke coverage.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

* Secure persisted connector state

Create the Connector Namespace artifacts directory and saved gateway config with private permissions, and align the reduced-motion regression notes with the static fallback behavior.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: a986299f-86be-46c3-9562-cbf7d25174cf

---------

Co-authored-by: Alex Yang <yangalex@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

extensions/connector-namespaces/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Microsoft Corporation.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.