Extension: add BP Lab

[martinwork]

Arising from https://support.microbit.org/helpdesk/tickets/87227 (private)
@bplab-dev
@abchatra

Extension: https://github.com/team-bp/pxt-bplab
Version: 1.0.0
Product: https://bplab-us.com/microbit
All blocks: https://makecode.microbit.org/_1jpcXT95yceU

[martinwork]

@abchatra The servo blocks cause the simulator to jump down, but no simulated servo is shown. Can this be improved? Either to show the simulated servo, or stop the simulator moving?

@abchatra This extension's code is based on other extensions with MIT License. Is a link to the original in the docs enough to satisfy the MIT license condition?
"The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software."

The originals are acknowledged in the docs, like this
https://github.com/team-bp/pxt-bplab/blob/96dc83f09f4f315f440c68981c6f932e7e502a1f/docs/ultrasonic-README.md?plain=1#L9
https://github.com/team-bp/pxt-bplab/blob/master/docs/ultrasonic-README.md

List of original extensions:
https://github.com/tinkertanker/pxt-iot-environment-kit
https://github.com/makecode-extensions/i2cLCD1602
https://github.com/tinkertanker/pxt-continuous-servo
https://github.com/makecode-extensions/TM1637
https://github.com/microsoft/pxt-sonar

@bplab-dev The link here is broken
https://github.com/team-bp/pxt-bplab/blob/96dc83f09f4f315f440c68981c6f932e7e502a1f/docs/seven-segment-README.md?plain=1#L9

[i33W]

Thank you for your feedback, I checked the broken link in the seven-segment-README.md file you mentioned.
This link has been fixed at 28c589fabf7f7f7f39a2a80644b86f836a919cf67f, and now it will be linked to the correct address.
Thank you for your quick feedback.

[abchatra]

@martinwork please file a separate issue with a small repro if you can.

@abchatra This extension's code is based on other extensions with MIT License. Is a link to the original in the docs enough to satisfy the MIT license condition?
"The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software."

This repo is MIT licensed, and original repo is also Microsoft repo with MIT license. We are good with this.