Update public About bio, address, and headshot (#2)

## Summary
Closes #1.

- Replace About page bio with the western-suburbs / Exit Realty Redefined copy and Monica's headshot
- Add `CONTACT_ADDRESS` (`1245 Butterfield Rd. #100, Wheaton, IL 60189`) and show it on Contact, nav, footer, and structured data
- Align Home hero + service-area defaults with Chicago's western suburbs

## Test plan
- [ ] `/about/` shows new bio and headshot
- [ ] `/contact/` map block shows Butterfield Rd address
- [ ] Header / footer on Home show the address
- [ ] Set `CONTACT_ADDRESS` in deploy `.env` if not relying on defaults
- [ ] Confirm OG image for About uses the new headshot

Reviewed-on: #2

.env.example

@@ -15,7 +15,8 @@ SITE_TAGLINE=MKDRealtor.com · EXIT Realty
 PUBLIC_SITE_URL=http://127.0.0.1:8000
 CONTACT_PHONE=(630) 452-4443
 CONTACT_EMAIL=moni.dhill@gmail.com
-CONTACT_SERVICE_AREA=Serving Chicagoland
+CONTACT_ADDRESS=1245 Butterfield Rd. #100, Wheaton, IL 60189
+CONTACT_SERVICE_AREA=Serving Chicago's western suburbs
 CREDIT_NAME=AI ML Operations, LLC
 CREDIT_URL=https://aimloperations.com
 
@@ -59,7 +60,7 @@ PCM_WEBHOOK_SECRETS=
 # PCM_WEBHOOK_SECRET=
 # Required return address on every postcard order.
 # Quote the JSON (compose/shell break on bare {…, …}).
-# PCM_RETURN_ADDRESS='{"firstName":"Monica","lastName":"Dhillon","address":"123 Main St","city":"Naperville","state":"IL","zipCode":"60540"}'
+# PCM_RETURN_ADDRESS='{"firstName":"Monica","lastName":"Dhillon","address":"1245 Butterfield Rd.","address2":"#100","city":"Wheaton","state":"IL","zipCode":"60189"}'
 PCM_RETURN_ADDRESS=
 # Or set fields individually if JSON is empty:
 # PCM_RETURN_LINE1=