6207: Extract ImportAssets out of auto_import r=matklad a=Veykril
See https://github.com/rust-analyzer/rust-analyzer/pull/6172#issuecomment-707182140
I couldn't fully pull out `AssistContext` as `find_node_at_offset_with_descend`: 81fa00c5b5/crates/assists/src/assist_context.rs (L90-L92) requires the `SourceFile` which is private in it and I don't think making it public just for this is the right call?
6224: ⬆️ salsa r=matklad a=matklad
bors r+
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6226: Add reminder to update lsp-extensions.md r=matklad a=matklad
bors r+
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6227: Reduce bors timeout r=matklad a=matklad
bors r+
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Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>