impl: verify cli signature (#562)

* impl: support for downloading and verifying cli signatures

* fix: class cast exception

* impl: embed the pgp public key as a plugin resource

This is the key that validates if the gpg signature was tampered

* chore: fix UTs related to CLI downloading

For one thing some method signature changed, some methods are now suspending functions
that will have to run in a coroutine in the tests. The second big issue is that now
the download function requests user's input via a dialog

* fix: download the correct CLI signature for Windows

The signature for windows CLI follows the format: coder-windows-amd64.exe.asc
Currently it is coded to coder-windows-amd64.asc which means the plugin
always fail to find any signature for windows cli

* chore: next version is 2.22.0

* impl: strict URL validation for the connection screen

This commit rejects any URL that is opaque, not hierarchical, not using http or https
protocol, or it misses the hostname.

* impl: strict URL validation for the URI handling

This commit rejects any URL that is opaque, not hierarchical, not using http or https
protocol, or it misses the hostname.

* fix: transform to url only after we checked the validation result

* chore: update UT expected result

fix: marketplace logos should use the new design (#557)

* fix: marketplace logos should use the new design

# Conflicts:
#	CHANGELOG.md

* chore: next version should be 2.21.1

impl: update icons to match the new branding (#555)

* impl: update icons to match the new branding

* fix: eap build is no longer available for verification

In the previous PR 2025.2 EAP build was available on the default repositories,
it no longer seems the case. Additionally, I've configured the verification
phase to use the latest available 2024.3 patch (6 patches available)

* chore: next version is 2.21.0

fix: pass the folder parameter to the IDE&Project dialog (#550)

* chore: use newer snapshot build for testing and building

I've also changed the list of Gateway versions we run the verifier against
to include Gateway 2025.1 while excluding some ancient releases.

Without this commit the PR will fail to build, the declared snapshots are
no longer available in the repository

* fix: pass the folder parameter to the IDE&Project dialog

The value of the `folder` URI parameter is passed to the IDE&Project
dialog when handling URIs. The folder value will be rendered instead
of the default home folder if the value is not blank.

-resolves #466

* chore: next version is 2.20.1

update version

Update version.

Update version.