Create git-diff-bun-lockfile.md

docs/guides/install/git-diff-bun-lockfile.md

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+---
+name: Configure git to diff Bun's lockb lockfile
+---
+
+To teach `git` how to generate a human-readable diff of Bun's binary lockfile format (`.lockb`), add the following to your local or global `.gitattributes` file:
+
+```js
+*.lockb binary diff=lockb
+```
+
+---
+
+Then add the following to you local git config with:
+
+```sh
+$ git config diff.lockb.textconv bun
+$ git config diff.lockb.binary true
+```
+
+---
+
+To globally configure git to diff Bun's lockfile, add the following to your global git config with:
+
+```sh
+$ git config --global diff.lockb.textconv bun
+$ git config --global diff.lockb.binary true
+```
+
+---
+
+## How this works
+
+Why this works:
+
+- `textconv` tells git to run bun on the file before diffing
+- `binary` tells git to treat the file as binary (so it doesn't try to diff it line-by-line)
+
+In Bun, you can execute Bun's lockfile (`bun ./bun.lockb`) to generate a human-readable version of the lockfile and `git diff` can then use that to generate a human-readable diff.