Add opencode init lifecycle support

[young5lee]

Summary

• add opencode detection, plugin installation, AGENTS.md lifecycle support, and target-aware rtk init flows so RTK can set up Claude, opencode, or both
• promote rtk uninstall to the canonical teardown command while keeping rtk init --uninstall as a compatibility alias, and align --show plus reviewer-facing docs with the shipped lifecycle
• add runtime/plugin compatibility fixes and Rust tests covering detection, install, uninstall, show-config, and opencode rewrite behavior

[pszymkowiak]

Hi! Thanks for the contribution! Since March 6, all PRs should target the develop branch instead of master (see CONTRIBUTING.md).

Could you update the base branch? Click Edit at the top right of this PR and change it from master to develop.

Thanks!

[pszymkowiak]

Thanks for the contribution! OpenCode support has been merged into develop via #300 (plugin + init lifecycle). It will be available in the next release once develop is merged to master. This PR is now superseded — if you'd like to contribute further, check the open issues!

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[pszymkowiak]

Thanks for the contribution! This feature has already been integrated in the latest version (v0.33.1). Please verify with the latest release that everything works as expected on your side.

Closing as already included — thanks!

[aeppling]

Hey

We are cleaning up the codebase and improving the project structure for better onboarding. As part of this effort, PR #826 reorganizes src/ from a flat layout into subfolders.

No logic changes — only file moves and import path updates.

What you need to do

Rebase your branch on develop when receiving this comment:

git fetch origin && git rebase origin/develop

Git detects renames automatically. If you get import conflicts, update the paths:

use crate::git;        // now: use crate::cmds::git::git;
use crate::tracking;   // now: use crate::core::tracking;
use crate::config;     // now: use crate::core::config;
use crate::init;       // now: use crate::hooks::init;
use crate::gain;       // now: use crate::analytics::gain;

Need help rebasing? Tag @aeppling