[GIT PULL] gitk: macOS fixes, README

The following changes since commit 93ff79ed417e8d1afa770b31721ad3640ed2d0ad:

  Merge branch 'docglobs' of github.com:ilyagr/gitk (2025-08-04 18:20:32 +0200)

are available in the Git repository at:

  https://github.com/j6t/gitk.git master

for you to fetch changes up to ac8fec7d8de265e56441713faaf4e08f11c31469:

  gitk: add README with usage, build, and contribution details (2025-08-28 19:51:31 +0200)

----------------------------------------------------------------
Johannes Sixt (2):
      Merge branch 'aqua-ctxbut' of github.com:ZhongRuoyu/gitk
      Merge branch 'tk87-touchpad-scroll' of github.com:ZhongRuoyu/gitk

Michael Rappazzo (1):
      gitk: add README with usage, build, and contribution details

Ruoyu Zhong (2):
      gitk: use <Button-3> for ctx menus on macOS with Tcl 8.7+
      gitk: fix trackpad scrolling for Tcl/Tk 8.7+

 README.md | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 gitk      | 26 +++++++++++++++++-
 2 files changed, 118 insertions(+), 1 deletion(-)
 create mode 100644 README.md