bug(docs,ci): gh-pages fail to deply; search index > 100 MB

[danceratopz]

Deploying docs upon merge to main is currently failing as the site's search index exceeds Githubs file size limit.

error: failed to push branch gh-pages to origin: "remote: error: Trace: 6f89850c61b6b63aa429f53853465888a0bf13f6d6be1bb41b10446c6ce1c59f        
remote: error: See https://gh.io/lfs for more information.        
remote: error: File main/search/search_index.json is 122.77 MB; this exceeds GitHub's file size limit of 100.00 MB        
remote: error: GH001: Large files detected. You may want to try Git Large File Storage - https://git-lfs.github.com./

[danceratopz]

This (or block exclusion) would have been preferable, but couldn't get it to work (even though we use the attr_list extension, see: https://squidfunk.github.io/mkdocs-material/setup/setting-up-site-search/#excluding-sections)

## Function Source Code {{ '{ data-search-exclude }' }}

::: {{ package_name }}
    options:
        filters: ["^[tT]est*|^Spec*"]

So went with skipping the whole page for functions. Function names remain searchable, but only on test module summary pages:

• fix(docs,ci): don't include function pages in site search index #1292