Update documentation and permalinks for consistency and clarity

- Changed references in markup.md to update "data.html" to "data/" for clarity.
- Updated metadata.md to correct the link to the general documentation.
- Modified navbar.md to ensure stub values match the new permalink structure.
- Adjusted tables.md to reflect the new permalink for the table visualization page.
- Updated about.md to change the permalink from "/about.html" to "/about/" and revised content for clarity and impact.
- Changed browse.md permalink from "/browse.html" to "/browse/" for consistency.
- Added copyright.md page with copyright information and terms of use.
- Updated data.md to change permalink from "/data.html" to "/data/" and added introductory content.
- Created donate.md page to facilitate donations and acknowledge supporters.
- Updated locations.md permalink from "/locations.html" to "/locations/" for consistency.
- Changed map.md permalink from "/map.html" to "/map/" for uniformity.
- Added erasure.md page discussing the historical context of Black queer Kansas Citians.
- Updated out-there.md to correct the link to Lea Hopkins' interview.
- Changed subjects.md permalink from "/subjects.html" to "/subjects/" for consistency.
- Updated timeline.md permalink from "/timeline.html" to "/timeline/" for uniformity.

_includes/head/item-meta.html

@@ -31,4 +31,4 @@
 }
 </script> 
 <!-- breadcrumbs schema -->
-<script type="application/ld+json">{"@context": "http://schema.org", "@type": "BreadcrumbList", "itemListElement": [{ "@type": "ListItem", "position": 1, "item": { "@id": "{{ "/" | absolute_url }}", "name": {{ site.title | jsonify }} } },{ "@type": "ListItem", "position": 2, "item": { "@id": "{{ '/browse.html' | absolute_url }}", "name": "Browse Collection" } },{ "@type": "ListItem", "position": 3, "item": { "@id": "{{ page.url | absolute_url }}", "name": {{ page.title | jsonify }} } }] }</script>
+<script type="application/ld+json">{"@context": "http://schema.org", "@type": "BreadcrumbList", "itemListElement": [{ "@type": "ListItem", "position": 1, "item": { "@id": "{{ "/" | absolute_url }}", "name": {{ site.title | jsonify }} } },{ "@type": "ListItem", "position": 2, "item": { "@id": "{{ '/browse/' | absolute_url }}", "name": "Browse Collection" } },{ "@type": "ListItem", "position": 3, "item": { "@id": "{{ page.url | absolute_url }}", "name": {{ page.title | jsonify }} } }] }</script>