Add strict CSP example

[amirhhashemi]

This PR adds an example demonstrating how to implement a strict CSP with a nonce. I created the project with the Solid CLI using the bare template and added CSP.

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[pkg-pr-new[bot]]

More templates

• example-bare
• example-basic
• example-experiments
• example-hackernews
• example-notes
• example-todomvc
• example-with-auth
• example-with-authjs
• example-with-drizzle
• example-with-mdx
• example-with-prisma
• example-with-solid-styled
• example-with-solidbase
• example-with-tailwindcss
• with-tanstack-router
• example-with-trpc
• example-with-unocss
• example-with-vitest

npm i https://pkg.pr.new/@solidjs/start@1903

commit: 4a33ee6

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Latest commit: 4a33ee6a17932a88a01a10e0f555e2be7aca1154

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[amirhhashemi]

I tried to address the mentioned concerns, but also made some small changes. So please review carefully.