runtime(menu): define shortcut for File->Open Tab (vim/vim#12895)

Seems missing as noted by Antonio Giovanni Colombo. So add it and use
the 'T' as shortcut, which does not seem to be used in the File dialog.

Verified on Windows.

https://github.com/vim/vim/commit/e059fae100448fee4b581dd5d90ee853ea18de7e

Co-authored-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Antonio Giovanni Colombo <azc100@gmail.com>

Farewell to Bram and dedicate upcoming Vim 9.1 to him (vim/vim#12749)

https://github.com/vim/vim/commit/e978b4534a5e10471108259118c0ef791106fd92

Also update the header for the following files that were converted to Vim9
script upstream:

- autoload/ccomplete.lua (vim9jitted)
- ftplugin.vim
- ftplugof.vim
- indent.vim
- indent/vim.vim
- makemenu.vim

This also updates the "Last Change" dates, even if some changes (due to rewrites
to Vim9 script) were not ported.

There's still a few other places where Bram is still mentioned as a maintainer
in the files we and Vim have:

- ftplugin/bash.vim
- indent/bash.vim
- indent/html.vim
- indent/mail.vim
- macros/accents.vim
- macros/editexisting.vim
- syntax/bash.vim
- syntax/shared/typescriptcommon.vim
- syntax/tar.vim
- syntax/typescript.vim
- syntax/typescriptreact.vim
- syntax/zimbu.vim

Maybe future patches will address that.

Also exclude changes to .po files that didn't apply automatically (the
`:messages` maintainer string isn't used in Nvim anyway).

Co-authored-by: Christian Brabandt <cb@256bit.org>

Update runtime files

https://github.com/vim/vim/commit/b7398fe41c9e1e731d058105a34158871ee83e3f

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Co-authored-by: Justin M. Keyes <justinkz@gmail.com>

Update runtime files

https://github.com/vim/vim/commit/86b4816766d976a7ecd4403eca1f8bf6b4105800

vim-patch:9.0.1029: autoload directory missing from distribution

Problem:    Autoload directory missing from distribution.
Solution:   Add the autoload/zig directory to the list of distributed files.

https://github.com/vim/vim/commit/84dbf855fb2d883481f74ad0ccf3df3f8837e6bf

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Update runtime files

https://github.com/vim/vim/commit/fa3b72348d88343390fbe212cfc230fec1602fc2

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Problem:    Cannot use the help menu from a terminal window.
Solution:   Add ":tlnoremenu" commands. (Yee Cheng Chin, closes vim/vim#7023)

https://github.com/vim/vim/commit/b45cd36bd90f71e4a35b1ef1f75a3bedef6d8bac

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Problem:    New buffers are not added to the Buffers menu.
Solution:   Turn number into string. (Yee Cheng Chin, closes vim/vim#5864)
https://github.com/vim/vim/commit/5908fdf72fa1995735e38c46f254ddde81a87c1f

Problem:    Buffer menu does not handle special buffers properly.
Solution:   Keep a dictionary with buffer names to reliably keep track of
            entries.
            Also trigger BufFilePre and BufFilePost for command-line and
            terminal buffers when the name changes.
https://github.com/vim/vim/commit/5e94a29ebbde10dd973d58f1adba9a2fc83877d1

Problem:    No menus specifically for the terminal window.
Solution:   Add :tlmenu. (Yee Cheng Chin, closes vim/vim#3439) Add a menu test.
https://github.com/vim/vim/commit/4c5d815256099b50eca2ec5bf8f9aaa67a890211

ADDR_OHTER comes from patch 8.1.1241, which has already been ported.