add ADR for env triad

[mslarae13]

Closes

• Determine policies for env_local_scale #840
• Determine policies for env_medium #841
• Determine policies for env_broad_scale #877

Relates to

• Milestone - Define EnvO value sets for supported environmental extensions (3.2) #468
• Document policies for each env triad term v2 #846
• Environmental triad curated drop down for other MIxS extensions/packages #79
• Add constraints on env_local_scale, env_medium, env_broad_scale submission-schema#189

[mslarae13]

@cmungall , maybe also try a bottom up approach, what maps to GOLD?

• Mark, didn't use GOLD but did use a bottom up as anything that's currently present in mongo DB or is valid for mims-soil.

App needs to show the PVs that we select.

[ssarrafan]

I think this can be closed but since there were multiple PR's I'll wait for @mslarae13 @turbomam to close this.

[eecavanna]

I read the first part of this ADR and left feedback on it. I think I may have been tagged as a reviewer by mistake as I am not familiar with the subject matter. I didn't read the second half of the ADR. I will un-tag myself as a reviewer. In case you do want me to review this ADR, you can re-add me.

[eecavanna]

Looks like I can't un-tag myself as a reviewer (maybe because I've already left feedback). Based on what I said in my previous comment, I don't plan on reviewing the remainder of this ADR unless someone confirms to me they want me to review it.

[mslarae13]

I read the first part of this ADR and left feedback on it. I think I may have been tagged as a reviewer by mistake as I am not familiar with the subject matter. I didn't read the second half of the ADR. I will un-tag myself as a reviewer. In case you do want me to review this ADR, you can re-add me.

@eecavanna wasn't a mistake! I just appreciate your thorough review and corrections :)
No problem on just doing the first half.
Thank you!!