ci: discover and build custom PlatformIO envs from usermods platformi… (

#5649)

* ci: discover and build custom PlatformIO envs from usermods platformio_override.ini.sample files

Adds two new jobs to the Usermod CI workflow to address issue #5648:
- get_custom_build_envs: scans all usermods/*/platformio_override.ini.sample files
  and emits a matrix of {usermod, env} pairs by extracting [env:*] section names
- build_custom: builds each discovered environment by copying the .ini.sample as
  platformio_override.ini and running pio run -e <env>

This allows PRs introducing usermods with custom build environments (such as
pixels_dice_tray) to have those environments validated in CI without committing
platformio_override.ini to the repository.

* ci: consolidate usermod build envs into per-usermod platformio_override.ini.sample files

Move usermod-specific PlatformIO environments out of the root
platformio_override.sample.ini and into dedicated files within each
usermod's own directory, making them discoverable by CI:


* run on push

* Fix AHT10_v2 example

* no d1_mini env

* no d1_mini env

* ci: filter usermod matrix to only build changed usermod directories

Instead of building every usermod with a library.json on each PR, use
git diff to identify which usermods/ subdirectories were actually touched
and intersect that with the known-good library.json list.

This reduces CI time significantly for PRs that only modify one or two
usermods (previously every PR triggered ~40 usermods × 4 chipsets).

Also removes the unnecessary PlatformIO install from get_usermod_envs
(the step only uses shell/jq, not pio) and adds fetch-depth: 0 to
ensure the base branch is available for the diff.

* SN_Photoresistor

* fix(ci): use PR base SHA for diff and guard jobs against push events

github.base_ref is empty on push events, causing 'ambiguous argument
origin/...HEAD'. Fix by:
- Adding github.event_name == 'pull_request' guard to both jobs so
  they never run on push events where pull_request context is absent
- Replacing origin/${{ github.base_ref }}...HEAD with
  ${{ github.event.pull_request.base.sha }} HEAD which uses the
  concrete base commit SHA provided by GitHub directly

* ESP32 builds all V4

* fix: rename/fix platformio_override sample files across usermods

- Rename *.ini (gitignored) and *.sample.ini (wrong extension order) to
  the correct platformio_override.ini.sample convention so CI discovers them
- Fix AHT10_v2: custom_usermods AHT10 → AHT10_v2 (match library.json name)
- Fix INA226_v2: custom_usermods INA226 → INA226_v2 (both envs)
- Fix TTGO-T-Display: replace direct [env:esp32dev] override with a named
  env that extends esp32dev; add note that library.json is absent so
  custom_usermods is not available for this usermod

Affected usermods: AHT10_v2, DHT, INA226_v2, SN_Photoresistor,
TTGO-T-Display, Temperature, four_line_display_ALT, rotary_encoder_ui_ALT

* perf: filter custom build matrix to changed usermods on PRs

On pull_request events, get_custom_build_envs now only scans usermod
directories that changed in the PR (matching the behaviour of the
get_usermod_envs job). On push events (e.g. merging a PR) it still
scans all usermods to validate the full set.

* fix release name

* fix release name

* fix: resolve 8 CI build failures in custom usermod environments

- BME280_v2: fix default_envs typo (usermod_bme280_esp8266_2m →
  usermod_esp8266_2m to match actual [env:] section name)
- DHT: replace extends env:custom32_LEDPIN_16 (not in this fork) with
  env:esp32dev + -D LEDPIN=16; rename env accordingly
- SN_Photoresistor: replace ${common.build_flags_esp8266} (key absent in
  this fork) with ${env:esp8266_2m.build_flags} / lib_deps equivalent
- sht: guard ESP.getChipModel() behind #ifdef ARDUINO_ARCH_ESP32 — method
  does not exist on ESP8266 (fixes custom_esp8266_2m_usermod_sht build)
- EleksTube_IPS: delete platformio_override.ini.sample — library.json is
  disabled so the env cannot build; delete rather than ship a broken sample
- pixels_dice_tray: exclude from build_custom matrix (same as standard
  matrix) — BLE library incompatibility with current IDF causes build failure
- workflow: add PWM_fan / BME68X_v2 to exclusion list in get_custom_build_envs
  for consistency with get_usermod_envs

* Do not add platformio_override.ini.sample just because example was in readme

---------

Co-authored-by: Frank Möhle <91616163+softhack007@users.noreply.github.com>

16.0.0

16.0.0-rc1

Merge pull request #5462 from willmmiles/16_x-unlimited-fxdata-size

Serialize fxdata without ArduinoJSON

0.15.5

0.15.4

fix ESPAsyncWebServer version reference

0.15.3

0.15.2

Merge pull request #5034 from willmmiles/0_15_x-fix-4929

0.15 - Fix bin file output names