Introduce the meilitool command line interface

[Kerollmops]

This PR introduces a small tool to help the Cloud team:

• Clear the tasks queue by removing all the tasks
• Dump a Meilisearch database without having to enqueue the task
• Access this meilitool binary from the Docker Image

TODO

• Modify the Docker File to ship with this new tool (@curquiza, could you review that, please?)
• Clear the tasks queue by removing all the tasks
  • Add more logs to explain what is happening
  • Clear the update_files folder
• Dump a Meilisearch database without having to enqueue the task
  • Add more logs to explain what is happening
  • Introduce a flag to skip dumping enqueued and processing tasks.
  • Dump the instance uid.
  • Dump the keys.
  • Dump the tasks with the update files.
  • Dump the index documents and settings.
  • Dump the experimental features

[curquiza]

⚠️ @Kerollmops if you add the v1.5.0 milestones, please merge the PR into release-v1.5.0 and not main

[curquiza]

@Kerollmops can you open an issue please ("sprint issue"), link it to this PR and ping the cloud team in the issue, since it's for them mostly? No need to detail the usage, just to let them know where they can find the usage

Also, can you rebase please (git conflicts)?

[curquiza]

@Kerollmops did you try to build a Docker prototype? Locally I get this error when trying to build the Docker image:

$ docker build -t test-meili-tool .

#12 248.3   Downloaded lindera-ko-dic v0.27.1
#12 248.7 error: package `anstream v0.6.4` cannot be built because it requires rustc 1.70.0 or newer, while the currently active rustc version is 1.69.0
#12 248.7 Either upgrade to rustc 1.70.0 or newer, or use
#12 248.7 cargo update -p [email protected] --precise ver
#12 248.7 where `ver` is the latest version of `anstream` supporting rustc 1.69.0
------
executor failed running [/bin/sh -c set -eux;         apkArch="$(apk --print-arch)";         if [ "$apkArch" = "aarch64" ]; then             export JEMALLOC_SYS_WITH_LG_PAGE=16;         fi &&         cargo build --release -p meilisearch -p meilitool]: exit code: 101

[Kerollmops]

@curquiza, it seems that you should probably clear your Docker cache or something, as the current Rust version is 1.74 according to this beautiful website 😇

[curquiza]

@Kerollmops it does not work on the CI either -> https://github.com/meilisearch/meilisearch/actions/runs/6694669045/job/18188526604
⚠️ I recommend testing with the Docker CI directly (= create a prototype) to ensure we can release rc2 without issue.

[curquiza]

Just tested with a basic and healthy database (not a "stuck" one or anything) -> the tool is available and the commands work! 🎉

[Kerollmops]

bors merge

[meili-bors]

Build succeeded:

• Run Clippy
• Run Rustfmt
• Run tests in debug
• Tests on macos-12
• Tests on ubuntu-18.04
• Tests on windows-2022