Build cli snap workflow

.github/workflows/cli-publish-snap.yml

@@ -0,0 +1,23 @@
+name: Publish Testflinger CLI snap to edge
+on:
+  push:
+    branches: ["main"]
+    paths:
+      - cli/**
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: snapcore/action-build@v1
+      id: build
+      with:
+        path: cli
+    - uses: snapcore/action-publish@v1
+      env:
+        SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.SNAP_STORE_LOGIN }}
+      with:
+        snap: ${{ steps.build.outputs.snap }}
+        release: edge

.github/workflows/server-charm-release-edge.yml

@@ -6,6 +6,7 @@ on:
       - main
     paths:
       - server/**
+  workflow_dispatch:
 
 jobs:
   build:

cli/README.rst

@@ -12,11 +12,19 @@ the status of them, and getting results.
 Installation
 ------------
 
-You can either run testflinger-cli from a checkout of the code, or
-install it like any other python project.
+It is recommended that you install testflinger-cli from the snap, however it
+can also be installed with pip directly from the source.
 
-To run it from a checkout, please make sure to first install python3-click
-and python3-requests
+To install testflinger using the snap:
+
+.. code-block:: console
+
+  $ sudo snap install testflinger-cli
+
+When changes are made to the CLI, the snap is automatically built and uploaded
+to the `edge` channel. Once sufficient testing has been performed, this snap
+is also published to the `stable` channel. If you prefer to use the latest
+code, then you can specify `edge` instead in the command above.
 
 To install it in a virtual environment: