doc: Describe components and peripherals in SE board - hardware page

[pradeeka7]

Summary

This page (https://www.genericnode.com/docs/sensor-edition/hardware/se-board/) has lack of information about onboard components and peripherals. This pull request briefly describes all of them.

Screenshots

Changes

• describes all the onboard components, peripherals, and pinouts.

• ...

Notes for Reviewers

@azerimaker Please double-check the descriptions of all the pinouts (programming/debugging/GPIO).

Checklist

• [X] Scope: The referenced issue is addressed, there are no unrelated changes.
• [X] Run Locally: Verified that the docs build using make server, posted screenshots, verified external links.
• [X] New Features Marked: Documentation for new features is marked using the new-in-version shortcode, according to the guidelines in CONTRIBUTING.
• [X] Style Guidelines: Documentation obeys style guidelines in CONTRIBUTING.
• [X] Commits: Commit messages follow guidelines in CONTRIBUTING, there are no fixup commits left.

[azerimaker]

@pradeeka7 should I merge this PR?

[pradeeka7]

@pradeeka7 should I merge this PR?

@azerimaker yes, please.