add some docs

.gitea/workflows/release/build-and-release.yaml

@@ -30,6 +30,7 @@ jobs:
         with:
           files: |-
             target/release/cl-cli
+            config.toml.dist
           api_key: '${{secrets.RELEASE_TOKEN}}'
           body: |
             ${{ steps.read_release.outputs.content }}

README.md

@@ -0,0 +1,34 @@
+# CL-cli utility
+
+Provide a CLI interface for several recurring tasks for Champs-Libres
+
+Currently:
+
+- convert a gitlab issue to a work package
+
+## Install & configure
+
+Download the most recent binaries at https://gitea.champs-libres.be/julienfastre/cl-cli/releases
+
+Once downloaded, install it:
+
+```
+# this will install the command globally with the name "cl-cli"
+sudo install cl-cli /usr/local/bin/cl-cli
+
+# this will install the command globally with the name "cl"
+sudo install cl-cli /usr/local/bin/cl
+```
+
+## Configure
+
+Copy the file [config.toml.dist](./config.toml.dist) as a template, and
+save it at the path `$HOME/.config/cl-cli/config.toml`:
+
+```bash
+mkdir -p $HOME/.config/cl-cli
+cp config.toml $HOME/.config/cl-cli/config.toml
+editor $HOME/.config/cl-cli/config.toml
+```
+
+Then, fill it with the required configuration options (gitlab and openproject token).