Improve error message when adding a wrong localhost URL

[curquiza]

Following this issue: meilisearch/meilisearch#4697

Improve the error message when an URL that lacks the protocol/scheme part is provided to Meilisearch

Currently we return: "Failed to connect to Meilisearch: No connection adapters were found for 'localhost:7700/version"

We want to be more explicit that the protocol/scheme is missing

[flevi29]

Isn't this a meilisearch-python issue? It should be moved there, if that's the case.

[curquiza]

@flevi29, hum, i'm not sure, why do you say this?

[flevi29]

Just going after the error message, it looks like a python thing.

[curquiza]

Discussed with @ManyTheFish and this is not only a problem to fix on Python's side

In the error message, we may want to add an additional information saying that it’s related to --http-addr or MEILI_HTTP_ADDR

[irevoire]

Yes, and since the SDK couldn’t reach Meilisearch, it definitely cannot be a Meilisearch error message