Merge branch 'master' of https://github.com/j6t/gitk

* 'master' of https://github.com/j6t/gitk:
  gitk: add README with usage, build, and contribution details
  gitk: fix trackpad scrolling for Tcl/Tk 8.7+
  gitk: use <Button-3> for ctx menus on macOS with Tcl 8.7+

diff --cc gitk-git/README.md
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++Gitk - The Git Repository Browser
++=================================
++
++Gitk is a graphical Git repository browser. It displays the commit
++history of a Git repository as a graph, showing the relationships
++between commits, branches, and tags.
++
++Usage
++=====
++
++To view the history of the current repository:
++```bash
++gitk
++```
++
++To view the history of specific files or directories:
++```bash
++gitk path/to/file
++gitk path/to/directory
++```
++
++To view a specific branch or range of commits:
++```bash
++gitk branch-name
++gitk v1.0..v2.0
++```
++
++For more usage examples and options, see the [gitk manual](https://git-scm.com/docs/gitk).
++
++Building
++========
++
++Gitk is a Tcl/Tk application. It requires Tcl/Tk to be installed on
++your system.
++
++Running directly
++----------------
++
++Gitk can be run from the source directory without installation:
++
++```bash
++./gitk
++```
++
++This allows for quick testing of changes.
++
++Installation
++------------
++
++To install system-wide, you can use either `make` or `meson`:
++
++```bash
++# Install to default location ($HOME/bin)
++make install
++
++# Install to system-wide location
++sudo make install prefix=/usr/local
++
++# Install to custom location
++make install prefix=/opt/gitk
++
++# Using Meson
++meson setup builddir
++meson compile -C builddir
++meson install -C builddir
++```
++
++Both build systems will handle setting the correct Tcl/Tk interpreter
++path and installing translation files.
++
++Contributing
++============
++
++Contributions are welcome! The preferred method for submitting patches
++is via email to the Git mailing list, as this allows for more thorough
++review and broader community feedback. However, GitHub pull requests
++are also accepted.
++
++All commits must be signed off (use `git commit --signoff`) and should
++have commit messages prefixed with `gitk:`.
++
++Email Patches
++-------------
++
++Send patches to git@vger.kernel.org and CC j6t@kdbg.org. See the Git
++project's [patch submission guidelines](https://git-scm.com/docs/SubmittingPatches)
++for detailed instructions on creating and sending patches.
++
++License
++=======
++
++Gitk is distributed under the GNU General Public License, either
++version 2, or (at your option) any later version.

diff --cc gitk-git/gitk
Simple merge