Move Code of Conduct

[ALRubinger]

Dependencies:

• Create page for Incubation Program #323
• Issue #323 - Add Incubation Program Page #457

It's now:

/code-of-conduct.

Make it:

/open-source/code-of-conduct.

• Update links on the site to match the new location
• ...including the one in the Open Source Page
• ...and in the footer
• ...and look wherever else
• Create a Netlify TOML redirect so things that link to it off-site don't break

[ALRubinger]

Verifying all internal links handled via:

$> egrep -R --exclude-dir=node_modules --exclude-dir=build --exclude-dir=.docusaurus --exclude-dir=.idea --exclude-dir=.git 'code-of-conduct'
./blog/2022-10-13-announcing-the-incubation-program.md:they follow our [Code of Conduct](/open-source/code-of-conduct)
./src/content/open-source/open-source.js:        url: '/open-source/code-of-conduct',
./src/content/open-source/incubation/content.mdx:  Like all projects in the TBD ecosystem, they follow our <a href="/open-source/code-of-conduct">Code of Conduct</a>
./src/theme/Footer.js:        href: '/open-source/code-of-conduct',
./src/pages/open-source/code-of-conduct.mdx:    content="https://developer.tbd.website/open-source/code-of-conduct"

[ALRubinger]

In PR #472