[TEMPLATE] apply ASDF AI Policy

[zacharyburnett]

Description

1. Adds the ASDF AI policy verbatim; here's a diff between STScI AI policy and ASDF AI policy:

6a7
>    2. The use of autonomous AI agents to submit issues, pull requests, or comments is not allowed. Accounts found to be doing so will be banned.
13c14,15
<    2. Committers are encouraged to apply a label of `ai-assisted` to pull requests that leveraged AI tools.
---
>    2. Contributors **must** disclose whether AI was used to assist in the development of a pull request. If so, you must specify which tools were used and how they were used. PRs that do not include this disclosure will be closed.
>    3. Committers are encouraged to apply a label of `ai-assisted` to pull requests that leveraged AI tools.
15,16c17,20
<    1. The pull request process is collaborative and iterative. Contributors are expected to actively engage with reviewer feedback themselves. Copying and pasting replies to / from a generative AI tool does not count as engaging with the reviewer.
<       All pull requests must be reviewed by a human other than the contributor.
---
>    1. AI should not be used to generate comments when communicating with maintainers. Issues and pull requests should be described in your own words. Any use of AI must be disclosed.
>    2. The pull request process is collaborative and iterative. Contributors are expected to actively engage with reviewer feedback themselves. Copying and pasting replies to / from a generative AI tool does not count as engaging with the reviewer.
>    3. If using AI tools for translation, please write in your native language and include the AI translation in a quote block following the original text.
>    4. All pull requests must be reviewed by a human other than the contributor.

2. applies the pull request template from the STScI package template

Tasks

• Update or add relevant gwcs tests.
• Update relevant docstrings and / or docs/ page.
• Does this PR need a changelog entry? (If not, label with no-changelog-entry-needed.)
  • Write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see below for change types).

News fragment change types:

• changes/<PR#>.feature.rst: new feature
• changes/<PR#>.breaking.rst: any change or deprecation of the public API
• changes/<PR#>.bugfix.rst: fixes an issue
• changes/<PR#>.doc.rst: documentation change
• changes/<PR#>.misc.rst: infrastructure or miscellaneous change

Generative AI Usage Disclosure

no genAI tools used

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.98%. Comparing base (00a1ad0) to head (452dd2e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #768   +/-   ##
=======================================
  Coverage   91.98%   91.98%           
=======================================
  Files          40       40           
  Lines        4190     4190           
=======================================
  Hits         3854     3854           
  Misses        336      336           

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[zacharyburnett]

splitting template sync off to #770 because we're still waiting for the chief engineers to reach a consensus on the AI policy