Reorganize documentation for new website (#213)

This PR should be merged after the new website is deployed.

- [x] Rename files
- [x] Add front matter section to all `.md` files in the book (necessary for Zola)
- [x] Change all internal links to use Zola's linking system that checks broken links
- [x] Some updates to documentation contents and organization

Co-authored-by: Alex Auvolat <alex@adnab.me>
Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/213
Co-authored-by: Alex <alex@adnab.me>
Co-committed-by: Alex <alex@adnab.me>

doc/book/development/scripts.md

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++++
+title = "Development scripts"
+weight = 10
++++
+
+We maintain a `script/` folder that contains some useful script to ease testing on Garage.
+
+A fully integrated script, `test-smoke.sh`, runs some basic tests on various tools such as minio client, awscli and rclone.
+To run it, enter a `nix-shell` (or install all required tools) and simply run:
+
+```bash
+nix-build # or cargo build
+./script/test-smoke.sh
+```
+
+If something fails, you can find useful logs in `/tmp/garage.log`.
+You can inspect the generated configuration and local data created by inspecting your `/tmp` directory:
+the script creates files and folder prefixed with the name "garage".
+
+## Bootstrapping a test cluster
+
+Under the hood `test-smoke.sh` uses multiple helpers scripts you can also run in case you want to manually test Garage.
+In this section, we introduce 3 scripts to quickly bootstrap a full test cluster with 3 instances.
+
+### 1. Start each daemon
+
+```bash
+./script/dev-cluster.sh
+```
+
+This script spawns 3 Garage instances with 3 configuration files.
+You can inspect the detailed configuration, including ports, by inspecting `/tmp/config.1` (change 1 by the instance number you want).
+
+This script also spawns a simple HTTPS reverse proxy through `socat` for the S3 endpoint that listens on port `4443`.
+Some libraries might require a TLS endpoint to work, refer to our issue [#64](https://git.deuxfleurs.fr/Deuxfleurs/garage/issues/64) for more detailed information on this subject.
+
+This script covers the [Launching the garage server](@/documentation/quick-start/_index.md#launching-the-garage-server) section of our Quick start page.
+
+### 2. Make them join the cluster
+
+```bash
+./script/dev-configure.sh
+```
+
+This script will configure each instance by assigning them a zone (`dc1`) and a weight (`1`).
+
+This script covers the [Creating a cluster layout](@/documentation/quick-start/_index.md#creating-a-cluster-layout) section of our Quick start page.
+
+### 3. Create a key and a bucket
+
+```bash
+./script/dev-bucket.sh
+```
+
+This script will create a bucket named `eprouvette` with a key having read and write rights on this bucket.
+The key is stored in a filed named `/tmp/garage.s3` and can be used by the following tools to pre-configure them.
+
+This script covers the [Creating buckets and keys](@/documentation/quick-start/_index.md#creating-buckets-and-keys) section of our Quick start page.
+
+## Handlers for generic tools
+
+We provide wrappers for some CLI tools that configure themselves for your development cluster.
+They are meant to save you some configuration time as to use them, you are only required to source the right file.
+
+### awscli
+
+```bash
+source ./script/dev-env-aws.sh
+
+# some examples
+aws s3 ls s3://eprouvette
+aws s3 cp /proc/cpuinfo s3://eprouvette/cpuinfo.txt
+```
+
+### minio-client
+
+
+```bash
+source ./script/dev-env-mc.sh
+
+# some examples
+mc ls garage/
+mc cp /proc/cpuinfo garage/eprouvette/cpuinfo.txt
+```
+
+### rclone
+
+```bash
+source ./script/dev-env-rclone.sh
+
+# some examples
+rclone lsd garage:
+rclone copy /proc/cpuinfo garage:eprouvette/cpuinfo.txt
+```
+
+### s3cmd
+
+```bash
+source ./script/dev-env-s3cmd.sh
+
+# some examples
+s3cmd ls
+s3cmd put /proc/cpuinfo s3://eprouvette/cpuinfo.txt
+```
+
+### duck
+
+*Warning! Duck is not yet provided by nix-shell.*
+
+```bash
+source ./script/dev-env-duck.sh
+
+# some examples
+duck --list garage:/
+duck --upload garage:/eprouvette/ /proc/cpuinfo
+```