Organisation-wide files for magnetite-browser.
profile/README.md: the text shown on the organisation page.CODE_OF_CONDUCT.md,SECURITY.md,SUPPORT.md: defaults that GitHub applies to every repository in the organisation that does not carry its own copy.
The browser repository carries its own SECURITY.md and CODE_OF_CONDUCT.md,
which win over the defaults here; keep them in sync when the policy changes.
The other repositories use the defaults.