Added an encode routine for a CanId

[ad3154]

• Added a way to encode an extended CAN ID from its components.
• Added an alias "BROADCAST" address which is the same as "GLOBAL". Internally at Raven we call it global but more broadly (and in AgIsoStack++) it seems to be called "broadcast".

It occurs to me that in my GitHub bio I say contributions are my own unless specified, so I should start saying when commits are on behalf of Raven.

So, this contribution is on behalf of Raven.

[github-actions]

File	Coverage	Lines	Branches
All files	32%	32%	0%	✅
src/driver/can_id.rs	0%	0%	0%	✅

Minimum allowed coverage is 0%

Generated by 🐒 cobertura-action against 1c48543

[Notgnoshi]

offtopic: I like to use https://conventionalcomments.org/ for comments on PRs, because I'm terrible at conveying tone through comments.

When I leave a nitpick: comment, I intend to convey that it's not something major, and am comfortable merging the PR without addressing the comment.

[ad3154]

When I leave a nitpick: comment, I intend to convey that it's not something major, and am comfortable merging the PR without addressing the comment.

Yeah, I know 😁 but these are super minor things in this case, I might as well make it as nice as possible now since they're quick, and it helps me learn rust-ways-of-doing-things (which as you all can probably see is something I still need to work on).