add sourcegraph search to query

[bobheadxi]

Related Tickets

n/a

Changes

Pending some work on https://github.com/leo-buneev/vuepress-plugin-fulltext-search/pull/10

Adds an option to query all of ubclaunchpad via Sourcegraph - try it out

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[bobheadxi]

going to merge this for now and update to the correct remote whenever it catches up - I suspect I might end up making more changes to this library since search is kind of important for us so we might end up using my fork for quite a while anyway