Introduce yarn.lock -> bun.lock{b} migrator #16166
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What does this PR do?
Once complete, this will make
bun install
automatically migrate yarn.lock files to bun.lock, preserving versions.The parser part is written and seems like it works. It does load dependencies from yarn.lock. It does not actually do the most important part, which is preserve versions - but that's likely because it seems like we need to read package.json to disambiguate which top-level dependencies are the root package's dependencies.
How did you verify your code works?
I copied npm's test fixtures, which will be used for tests. Thanks @isaacs