[mmustafasenoglu]

Fixes #803

Summary

• remove references to the no-longer-existing tizonia-all AUR package
• correct the tizonia-all-git checkout directory in the installation instructions

Testing

Documentation-only change; verified the README diff and checked for obsolete installation commands.

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[juanrubio]

Thanks for fixing the obsolete AUR installation instructions and the cd tizonia-all-git directory name. One small factual correction is needed before merge.

The dated 2017 news entry currently records the historical submission of both tizonia-all and tizonia-all-git. Rewriting it to say that only tizonia-all-git was submitted changes that history. Please keep the retired package as unlinked text and clarify its current status, for example:

- [2017-08-26] `tizonia-all` (now retired) and [tizonia-all-git](https://aur.archlinux.org/packages/tizonia-all-git/) packages submitted to the [Arch User Repository](https://aur.archlinux.org/)

The installation-section removals and checkout-directory fix otherwise look good.

[mmustafasenoglu]

Thanks for the correction! Updated the 2017 news entry to keep tizonia-all as unlinked text with "(now retired)" status while preserving tizonia-all-git as a linked package.

[juanrubio]

The requested historical correction is applied exactly: tizonia-all remains as unlinked retired text, while tizonia-all-git remains linked. The installation cleanup and corrected checkout directory are unchanged. I also verified the surviving AUR link returns HTTP 200 and the README has no trailing whitespace. Approved.