luci-app-example: add missing dependencies

[GeorgeSapkin]

• This PR is not from my main or master branch 💩, but a separate branch ✅
• Each commit has a valid ✒️ Signed-off-by: <[email protected]> row (via git commit --signoff)
• Each commit and PR title has a valid 📝 <package name>: title first line subject for packages
• Incremented 🆙 any PKG_VERSION in the Makefile
• Tested on: ath79/generic, OpenWrt 24.10.0-rc7 r28417-daef29c75d on TP-Link Archer C7 v2 ✅
• ( Preferred ) Mention: @andibraeu @cricalix
• ( Preferred ) Screenshot or mp4 of changes:
• Description:
  luci-app-example that's installed from 24.10.0-rc7 repos has non-working RPC examples due to missing dependencies used in applications/luci-app-example/root/usr/libexec/rpcd/luci.example. This PR adds the required dependencies to the app's Makefile.

[hnyman]

The example app is supposed to be JavaScript based, so without lua.
Adding lua related dependencies looks wrong.

[GeorgeSapkin]

The example app is supposed to be JavaScript based, so without lua.
Adding lua related dependencies looks wrong.

The RPC examples (RPC Array Example, RPC JSONMap Table Example and RPC JSONMap Typed Example) call the mentioned lua script in applications/luci-app-example/root/usr/libexec/rpcd/luci.example and they don't work without the lua dependencies. Perhaps lua used to be included as part of something else in the past or the examples are not even meant to be installed through the package manager.

[systemcrash]

Then this example app is outdated, and if it's to be an example of what openwrt currently promotes, then those calls should be (written in) ucode. lua is slowly being excised from openwrt. So the only thing for it is to remove anything lua based from the examples.

[GeorgeSapkin]

@systemcrash I gave it a shot rewriting the lua part in ucode in a new PR: #7602