chore: prep for mkdocs-tacc theme (#239)

* docs: css README updates

* docs: js README updates

* chore: remove config for theme we do not use (yet)

The feature is from MkDocs Material theme —

https://squidfunk.github.io/mkdocs-material/setup/setting-up-navigation/#back-to-top-button

— but we use MkDocs Tacc theme, which skins ReadTheDocs theme.

* docs: delete cruft from TACC-Docs v0.15

Author: wesleyboar

PUBLISHING.md

@@ -17,6 +17,3 @@ A Watchtower service will monitor new pushes to this dockerhub repo and pull dow
 ## Releases
 
 [Releases](https://github.com/DesignSafe-CI/DS-User-Guide/releases) are made when a significant set of **functional** Pull Requests have been merged.
-
-> [!NOTE]
-> Releases are only used by clients of the TACC MkDocs [configuration](https://github.com/DesignSafe-CI/DS-User-Guide/blob/v0.14.0/mkdocs.base.yml) and [theme](https://github.com/DesignSafe-CI/DS-User-Guide/tree/v0.14.0/themes/tacc-readthedocs), so changes to the content of documents do **not** merit a release.

user-guide/docs/css/README.md

@@ -1,4 +1,5 @@
 # DesignSafe User Guide Styles
 
-Styles specific to DS-User-Guide should be in this directoy.
-Styles any TACC docs should be in https://github.com/TACC/TACC-Docs.
+Styles specific to DS-User-Guide should be in this directory.
+
+Styles for all TACC-themed docs belong in https://github.com/TACC/mkdocs-tacc.

user-guide/docs/js/README.md

@@ -1,4 +1,5 @@
 # DesignSafe User Guide Scripts
 
-Scripts specific to DS-User-Guide should be in this directoy.
-Scripts any TACC docs should be in https://github.com/TACC/TACC-Docs.
+Scripts specific to DS-User-Guide should be in this directory.
+
+Scripts for all TACC-themed docs belong in https://github.com/TACC/mkdocs-tacc.

user-guide/mkdocs.yml

@@ -15,8 +15,6 @@ theme:
     cms_name: designsafe-ci.org # TACC Feature
     nav_name: User Guide # TACC Feature
     navigation_depth: 6
-    features:
-      - navigation.top
     analytics:
       gtag: G-D96RT1T24K