* fix(diff): add --no-pager and package header to git diff
Previously, each package's diff was shown via a separate `git diff`
invocation with Show(), allowing git to invoke its own pager (e.g. less)
independently for each package. This caused inconsistent pagination:
large diffs opened a pager, small diffs scrolled past in the terminal.
Changes:
- Add --no-pager flag to git diff so git doesn't open its own pager
per package; all diffs now stream consistently to stdout.
- Print a package name header before each diff so users can easily
identify which package each diff belongs to when reviewing multiple
packages.
Closes#1243
* bunch up diffs and render in one go
Co-authored-by: Jo Garnier <me@jguer.space>
