Current pull request contains patched `CHANGELOG.md` file for the
`v0.6.2` version.

Co-authored-by: GitHub Action <action@github.com>

Some users complained that Coder Toolbox has a noticeable delay in
rendering the workspaces
status compared with the web Dashboard, even though they have the same
polling frequency,
which is every 5 seconds.
However, the web Dashboard also reacts and when the tab receives focus
from the user which
improves the experience. This PR tries to implement the same behavior,
when Coder Toolbox
screen becomes visible the polling is triggered immediately which should
result in a status update.

Until this commit, the CLI download manager relied on a separately configured HTTP
client that lacked proxy support, unlike the REST client which was refactored and modularized.
Now we have the same support for proxy and a proper user agent and custom logging interceptor.