FCC Donation Page Embed into WordPress

[aaronashby]

Description

I embedded the donation page ("Make a Difference" banner, GrowingGoal.tsx, and DonationForm.tsx) into WordPress. As of writing this PR, it is currently on a draft page in FCC's WP admin page, which I linked below

Changes Made

• Added new build-embed script to project.json to build the embedded app

• Modified donation form styling

• Created embed.tsx, which is similar to root.tsx, but shows the banner instead of the carousel on top

• Added config file vite.embed.config.mts

• Added fcc-donation.php to allow the plugin for enqueuing the css and js needed to display everything

• Wrote documentation explaining how the shortcode works, where assets live, and how to update the build

• Backend changes

• Frontend changes

• Database schema changes

• Configuration updates

• Other

Testing & Verification

• Unit tests pass
• Manual testing completed
• No breaking changes

Verification Steps:

I created a draft page at https://fenwaycommunitycenter.org/?page_id=20697&preview=true (you must be logged into the WP admin to access this) and added the shortcode [fcc_donation]

Screenshots (if relevant)

Future Improvements/Notes

• I have not yet ensured that this works with our backend as my Docker's been acting strange lately. For now, I wanted to make sure the frontend works as expected.
• I'm not too sure why the header text appears that big

Related Issues

Closes #76

[thaninbew]

LGTM!!