`repository` in the config is not used anymore

[s3i7h]

following up #420

I ended up there while bisecting repository → repositoryBase 's silent (and partialy a breaking) change. I believe this PR removed support of setting repository in the configuration file, which makes tldr fallback to default assets instead of the specified one. To handle this:

• Update documentation according to the code (to supply a base url and construct the actual download inside tldr) and note it's a breaking change
• Add a condition to allow all-language download if repository was specified (this makes it backwards compatible)

I think one of the two (prefferably both) of the above measures should be taken. (I think the second one should be implemented with a deprecation warning of some form as it's inefficient for both the client and the server)(if we're going to implement it)

Affected codes between prior to #420 and the current main branch (7ad3c5aa53a40adc3ac419ca682776d20bc828cd..c58c92cd4806840dbe094f28a2a1c47c0f00c67d):

• config.json: https://github.com/tldr-pages/tldr-node-client/blob/7ad3c5aa53a40adc3ac419ca682776d20bc828cd/config.json#L3 https://github.com/tldr-pages/tldr-node-client/blob/c58c92cd4806840dbe094f28a2a1c47c0f00c67d/config.json#L3

• lib/cache.js https://github.com/tldr-pages/tldr-node-client/blob/7ad3c5aa53a40adc3ac419ca682776d20bc828cd/lib/cache.js#L53-L56 https://github.com/tldr-pages/tldr-node-client/blob/c58c92cd4806840dbe094f28a2a1c47c0f00c67d/lib/cache.js#L51-L56

• lib/remote.js https://github.com/tldr-pages/tldr-node-client/blob/7ad3c5aa53a40adc3ac419ca682776d20bc828cd/lib/remote.js#L8-L9 https://github.com/tldr-pages/tldr-node-client/blob/c58c92cd4806840dbe094f28a2a1c47c0f00c67d/lib/remote.js#L10-L15

I don't have time currently to make a PR on my own now, so I would appreciate if someone could handle this. However if this remains for a month or two, maybe I can put my hands on it.

[agnivade]

@kbdharun @owenvoke - Wondering if you guys can take a look?