In-place profile editing

[erlend-sh]

Continued from https://github.com/commune-os/weird/discussions/66#discussioncomment-9840420:

There are two major steps:

1. Creating the themed user page.
2. Adding inline editing.

For creating the themed user page, we need:

• a new src/lib/themes/[SomeThemeName].svelte file
• It needs to take a Profile as a $prop and render that profile data nicely in the theme.

For adding inline editing we need to:

• Add interactive features to the [SomeThemeName].svelte that let you edit the profile data on the page.