Adapt BatteryManager events to the new event structure

[teoli2003]

This PR updates the BroadcastChannel interface for new-style event pages. (see the template).

As onXYZ exists and XYZ_event not, for each onXYZ

• yarn content move /Web/API/xxxx/onXYZ /Web/API/xxxx/XYZ_event
• Update browser-compat front-runner key
• Update title front-runner key to: Interface: XYZ event (with ticks!)
• Remove Property and Event Handler from the tag list and add Event instead (more cleaning possible)
• Check if the event bubbles. Do nothing if not.
• Change intro to explain the event itself and no more just onXYZ.


  Example: "The levelchange event of the Battery Status API is fired when the battery {{domxref("BatteryManager.level","level")}} property is updated."

• Copy the syntax section from the template, and fix the names of event and of the onXYZ property
• Add the Event type section (two texts possible! If inheritance is not only Event, do these additional steps:
  • N/A Update the argument of {{InheritanceDiagram}}
  • N/A Add the Event properties section and list the parameters, taken from the interface of the event type
• Check that no mention of this onXYZ is a link.
• Check that links to onXYZ is a link to the adequate XYZ_event

On the API interface page:

• Remove the Event handlers section
• Add the Events section

On each page of the interface and the API overview page:

• Check that there are no links to onXYZ.
• Check that examples uses the modern syntax for defining function in event handler (onXYZ = event => { …} )
• Check that no {{event} macro is left.
• Fix flaws (as much as possible); at least, make sure not to introduce new flaws.
• Check that if an event is linked to a property value, that property documents when this event is fired.


  Example: "When its value changes, the chargingchange event is fired."

Optional:

• Remove gremlins (non-breaking spaces, curly tick, curly double-ticks)
• If the interface is no more experimental, remove the experimental tags/banners.

Administration:

• Link to the BCD PR.

BCD: mdn/browser-compat-data#14993

[github-actions]

Preview URLs

• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/charging
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/chargingTime
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/chargingchange_event
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/chargingtimechange_event
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/dischargingTime
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/dischargingtimechange_event
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/level
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager/levelchange_event
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/BatteryManager
• https://pr13021.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/Battery_Status_API

Flaws

Note! 5 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/API/BatteryManager/chargingtimechange_event
Title: BatteryManager: chargingtimechange event
on GitHub
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: api.BatteryManager.chargingtimechange_event

---

URL: /en-US/docs/Web/API/BatteryManager/levelchange_event
Title: BatteryManager: levelchange event
on GitHub
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: api.BatteryManager.levelchange_event

---

URL: /en-US/docs/Web/API/BatteryManager/dischargingtimechange_event
Title: BatteryManager: dischargintimechange event
on GitHub
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: api.BatteryManager.dischargingtimechange_event

---

URL: /en-US/docs/Web/API/BatteryManager/chargingchange_event
Title: BatteryManager: chargingchange event
on GitHub
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: api.BatteryManager.chargingchange_event

---

URL: /en-US/docs/Web/API/Battery_Status_API
Title: Battery Status API
on GitHub
Flaw count: 4

• bad_bcd_links:
  • no explanation!
  • no explanation!
  • no explanation!
  • no explanation!

External URLs

URL: /en-US/docs/Web/API/BatteryManager
Title: BatteryManager
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/chargingTime
Title: BatteryManager.chargingTime
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/level
Title: BatteryManager.level
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/chargingtimechange_event
Title: BatteryManager: chargingtimechange event
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/levelchange_event
Title: BatteryManager: levelchange event
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/dischargingtimechange_event
Title: BatteryManager: dischargintimechange event
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/dischargingTime
Title: BatteryManager.dischargingTime
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/charging
Title: BatteryManager.charging
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/BatteryManager/chargingchange_event
Title: BatteryManager: chargingchange event
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/API/Battery_Status_API
Title: Battery Status API
on GitHub

• https://hacks.mozilla.org/2012/02/using-the-battery-api-part-of-webapi/ (1 time) (Note! This may be a new URL 👀)

(this comment was updated 2022-02-16 10:35:43.191480)

[Elchi3]

Nice work! I just found some nits