Improve logging

[maninak]

Currently, we log bare strings in the Output Panel, when logging. Each log entry's string is manually prefixed with a timestamp and severity. The result looks like this:

But there's a better way to do it:

In the example above, the timestamp is automatically resolved, the text is parsed and colorized making it much more readable, and most importantly the severity is declaratively defined in a way that VS Code can parse it. This not only allows the user to set their desired log verbosity level

but also us as extension authors to log a lot more events (which could ease production debugging, issue reporting and reproduction) without fear that we will produce too much noice. Especially given the fact that there are more log levels than we're using now

Acceptance Criteria

1. our logs look like the nice image above, colorized, better timestamp etc
2. every successful shell command execution (i.e. using exec()) is logged by default, using trace level
3. care is taken to migrate each existing calls to exec() and keep logging things we already do while also not logging things we already don't want to log
4. logs are produced when a file or config watcher is triggered
5. logs are produced when a command is triggered
6. logs are produced when HTTP requests get sent
7. the above ACs are revisited to ensure they are sensible and also nothing else is missing

NOTES:

• the earlier we do this the better logs we'll have in the long term because currently we're purposefully not logging things to reduce noise. If we could hide away things in trace or debug level then we'd definitely add more logs as we code stuff that we will probably not remember to cover if we do it after the fact

• I understand that achieving the above involves changing

  - window.createOutputChannel('Radicle')
  + window.createOutputChannel('Radicle', { log: true })

  but there's definitely a bit more to it.

• this is where VS Code's built-in "log language" is defined, in case we want to leverage that to improve parsing/formatting https://github.com/microsoft/vscode/tree/main/extensions/log

• when done it may be worth providing an answer to this SO question and help others in the community https://stackoverflow.com/questions/75764745/how-can-i-add-colorization-for-other-log-level-string-token-variations-in-vs-cod