Revert baseUrl to / for custom domain

[austingreco]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

What changed?
Reverts baseUrl from /michelangelo/ back to / and updates the site url to https://michelangelo-ai.org (the custom domain).

This is the counterpart to PR #972, which set baseUrl to /michelangelo/ as a temporary workaround for GitHub Pages project site serving.

Why?
Once DNS for michelangelo-ai.org is configured and propagated, the site will be served at the root path under the custom domain. The /michelangelo/ prefix will no longer be needed and will break all site links.

The CNAME file (michelangelo-ai.org) was already added in PR #971.

How did you test it?
Verified the Docusaurus config matches the expected setup for custom domain deployments per the Docusaurus docs.

Potential risks

• Do NOT merge until DNS is fully configured and propagated — merging early will break the site at michelangelo-ai.github.io/michelangelo/
• All internal links will lose the /michelangelo/ prefix

Release notes
Switches site deployment from GitHub Pages project path to custom domain (michelangelo-ai.org).

Documentation Changes
None

[austingreco]

https://michelangelo-ai.org is ready now

% dig michelangelo-ai.org

; <<>> DiG 9.10.6 <<>> michelangelo-ai.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 616
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;michelangelo-ai.org.           IN      A

;; ANSWER SECTION:
michelangelo-ai.org.    600     IN      A       185.199.109.153
michelangelo-ai.org.    600     IN      A       185.199.110.153
michelangelo-ai.org.    600     IN      A       185.199.111.153
michelangelo-ai.org.    600     IN      A       185.199.108.153

;; Query time: 63 msec
;; SERVER: 192.168.50.1#53(192.168.50.1)
;; WHEN: Wed Apr 08 20:52:31 PDT 2026
;; MSG SIZE  rcvd: 112

[sallycr]

thanks