The example apps were named after their frameworks (react, vue, next,
...). A workspace project named "react" can take pnpm's hidden-hoist
slot (node_modules/.pnpm/node_modules/react) instead of the real React
package. @hcaptcha/react-hcaptcha, pulled in by @web3auth/modal, imports
react without declaring it and resolves only through that slot, so Vite
failed with 'Failed to resolve entry for package "react"'.

Rename the examples to use-wallet-example-<name> and switch the
Playwright web server to a path-based filter. The lockfile keys
workspace projects by path, so it is unchanged.

Also add the missing `pnpm build:packages` step to the "Running
Examples" section of CONTRIBUTING.md. The examples import the packages
from dist/, which a fresh clone doesn't have.

The example apps were named after their frameworks (react, vue, next,
...). A workspace project named "react" can take pnpm's hidden-hoist
slot (node_modules/.pnpm/node_modules/react) instead of the real React
package. @hcaptcha/react-hcaptcha, pulled in by @web3auth/modal, imports
react without declaring it and resolves only through that slot, so Vite
failed with 'Failed to resolve entry for package "react"'.

Rename the examples to use-wallet-example-<name> and switch the
Playwright web server to a path-based filter. The lockfile keys
workspace projects by path, so it is unchanged.

Also add the missing `pnpm build:packages` step to the "Running
Examples" section of CONTRIBUTING.md. The examples import the packages
from dist/, which a fresh clone doesn't have.

fix(upgrade): report what changed, surface apt errors, refresh the signing key

A failed apt-get update now only continues when an error known to leave the Algorand lists usable explains the failure. Warnings alone, or an apt killed by a signal, stop the upgrade, since the cached lists would otherwise make it look up to date.

- Ask apt-cache policy which repositories provide algorand before updating, and treat errors naming those URIs as Algorand failures, so a mirror or proxy with a stale key no longer looks up to date.
- Treat unrecognised apt-get update errors as fatal. Only another repository's errors, a failing Post-Invoke hook and the "Some index files failed" summary stay warnings; a failing Pre-Invoke hook now stops the upgrade.