docs: add Arch Linux (AUR) install instructions

[EricVogt93]

What

Adds an Install on Arch Linux (AUR) section to the README documenting how to install the prebuilt Eigent desktop app via the eigent-bin AUR package.

Why

Arch Linux users currently have no documented one-command install path. The eigent-bin package builds the official AppImage release, so the desktop app can be installed and kept up to date with any AUR helper:

paru -S eigent-bin   # or: yay -S eigent-bin

Changes

• New ### 📦 Install on Arch Linux (AUR) section under Getting Started
• Matching entry in the table of contents

Docs-only; no code changes.

[EricVogt93]

@Douglasymlai Could you please update me what the problem with the actual state is. Should be something changed?

[Douglasymlai]

Hi @EricVogt93, the label is used internally to assign PRs to our core maintainers for review. There’s nothing else needed from your side at the moment. If any changes are required, our maintainer will comment directly under this PR.

I’ve also added this PR to the most recent sprint, so it should be included in the next version release. There may be some delay in the review process as we currently have many PRs to go through, but we aim to review and resolve all PRs within one or two weeks.

If everything looks good, this PR will be merged into the main branch for the next release. Thanks again for your contribution.

[Douglasymlai]

Initial review looks good to me. Thanks for your contribution! @4pmtong, could you please review the documentation content in detail, particularly the AUR package wording and maintenance expectations?

[4pmtong]

Thanks for the contribution. This is a useful installation path for Arch users, and we appreciate you taking the time to document it.

Because the README is an official entry point for users, we need to be careful about adding package-manager installation methods before we have verified ownership and maintenance expectations for the package. At the moment, we have not confirmed that the eigent-bin AUR package is maintained through the Eigent release process, so I don’t think we should include it in the official README yet.

I’m going to hold off on merging this for now while we clarify the AUR package ownership, release update process, and checksum/signing expectations. Once that is clear, we’d be happy to revisit Arch/AUR installation docs.