doc: scripts: merge_search_indexes: align with Sphinx

[gmarull]

• Remove trailing ;
• Use minimal JSON separators and sort keys

[Copilot]

Pull Request Overview

This PR modifies the search index dump function to optimize the output format and remove trailing semicolons.

• Added JSON formatting options (separators and sort_keys) to minimize whitespace and ensure consistent ordering
• Removed the semicolon from the end of the dumped search index format

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[NordicBuilder]

CI Information

^{To view the history of this post, click the 'edited' button above}
Build number: 1

Inputs:

Sources:

sdk-nrf: PR head: 555a058e9fe76c0819d1469f0f7d585d62e6fc8c

more details

sdk-nrf:

PR head: 555a058e9fe76c0819d1469f0f7d585d62e6fc8c
merge base: ca23ed585745e17a326fa14abe0d33da48cd23d2
target head (main): ad7d9b915b4d543e00b23c7b9be6a20dad9c63fd
Diff

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (1)

doc
│  ├── _scripts
│  │  │ merge_search_indexes.py

Outputs:

Toolchain

Version:
Build docker image:

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ◻️ Toolchain
• ◻️ Build twister
• ◻️ Integration tests

Disabled integration tests

• • test-fw-nrfconnect-nrf_lrcs_positioning
  • desktop52_verification
  • test_ble_nrf_config
  • test-fw-nrfconnect-apps
  • test-fw-nrfconnect-ble_mesh
  • test-fw-nrfconnect-ble_samples
  • test-fw-nrfconnect-chip
  • test-fw-nrfconnect-fem
  • test-fw-nrfconnect-nfc
  • test-fw-nrfconnect-nrf-iot_libmodem-nrf
  • test-fw-nrfconnect-nrf-iot_lwm2m
  • test-fw-nrfconnect-nrf-iot_samples
  • test-fw-nrfconnect-nrf-iot_thingy91
  • test-fw-nrfconnect-nrf-iot_zephyr_lwm2m
  • test-fw-nrfconnect-nrf_crypto
  • test-fw-nrfconnect-ps-main
  • test-fw-nrfconnect-rpc
  • test-fw-nrfconnect-rs
  • test-fw-nrfconnect-tfm
  • test-fw-nrfconnect-thread-main
  • test-low-level
  • test-sdk-audio
  • test-sdk-dfu
  • test-sdk-find-my
  • test-sdk-mcuboot
  • test-sdk-wifi
  • test-secdom-samples-public

Note: This message is automatically posted and updated by the CI

[github-actions]

You can find the documentation preview for this PR here.