MLPAB-1735 - add instructions for configuring weblate cli (#952)

* add instructions for configuring weblate

.weblate

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+; see docs/runbooks/configuring_weblate_access.md
+[weblate]
+translation = opg-modernising-lpa/opg-modernising-lpa

docs/runbooks/configuring_weblate_access.md

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+# Configuring weblate access to manage translations and merge conflicts
+
+These are instructions for configuring weblate access
+
+## Prerequisites
+
+install the weblate cli
+
+```sh
+pip install wlc
+```
+
+there are instructions also for using the docker image here: `https://docs.weblate.org/en/weblate-5.2.1/wlc.html#docker-usage`
+
+## Configuring weblate access
+
+Put the following in your `~/.config/weblate` file:
+
+```ini
+[weblate]
+url = https://moj.weblate.cloud/api/
+
+[keys]
+https://moj.weblate.cloud/api/ = APIKEY
+```
+
+Your api key can be found in the weblate account page under `https://moj.weblate.cloud/accounts/profile/#api`
+
+## Managing translations
+
+The repository has a `.weblate` file which contains the configuration for our translations.
+
+That means from the repository root you can run weblate cli commands like:
+
+```sh
+wlc ls
+```
+
+or
+
+```sh
+wlc lock
+```