Fix aliases injected via use

[JesseHerrick]

Note

Medium Risk
Touches core Elixir LSP resolution paths (definition/hover/completion/rename/references) by expanding alias resolution using cached __using__ parsing; mistakes could cause widespread mis-resolutions or performance regressions on large projects.

Overview
Fixes module resolution when a consumer relies on aliases injected by use macros.

parseUsingBody/parseHelperQuoteBlock now extract alias declarations (including as: and multi-alias forms) from __using__/helper quote do blocks and store them in the usingCacheEntry. The server merges these use-injected aliases (including transitive use chains) into the in-scope alias map for definition/hover/completion/actions and ensures rename logic still treats only file-local as: aliases as renames.

Adds unit tests covering alias extraction from __using__ and go-to-definition/hover resolution through a use-injected alias.

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