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Fixes #30 #18 #17

Bump protobuf-net from 3.0.52 to 3.0.73

Bumps [protobuf-net](https://github.com/protobuf-net/protobuf-net) from 3.0.52 to 3.0.73.
- [Release notes](https://github.com/protobuf-net/protobuf-net/releases)
- [Changelog](https://github.com/protobuf-net/protobuf-net/blob/main/docs/releasenotes.md)
- [Commits](https://github.com/protobuf-net/protobuf-net/commits)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

When downloading using -ugc we need to check UGCDetails first for a file URL (like -pubfile). Resolves #59

If an output directory is not specified, the deleted files list should be limited to each individual depot.

Bumps [protobuf-net](https://github.com/protobuf-net/protobuf-net) from 3.0.24 to 3.0.52.
- [Release notes](https://github.com/protobuf-net/protobuf-net/releases)
- [Changelog](https://github.com/protobuf-net/protobuf-net/blob/main/docs/releasenotes.md)
- [Commits](https://github.com/protobuf-net/protobuf-net/compare/3.0.24...3.0.52)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Implemented deleting files when updating

Bumps [SteamKit2](https://github.com/SteamRE/SteamKit) from 2.3.0-beta.2 to 2.3.0.
- [Release notes](https://github.com/SteamRE/SteamKit/releases)
- [Commits](https://github.com/SteamRE/SteamKit/compare/2.3.0-beta.2...2.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [protobuf-net](https://github.com/protobuf-net/protobuf-net) from 2.4.6 to 3.0.24.
- [Release notes](https://github.com/protobuf-net/protobuf-net/releases)
- [Changelog](https://github.com/protobuf-net/protobuf-net/blob/main/docs/releasenotes.md)
- [Commits](https://github.com/protobuf-net/protobuf-net/commits/3.0.24)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Add github action build workflow

* Changed saved manifest name format for better clarity
* Expanded manifest-to-text conversion

* Add missing parameters to readme
* Format readme
* Add examples to readme

Use PublishedFile.GetItemDetails when looking up pubfiles. This also requires -app to be specified with -pubfile.

Limit unnecessary concurrent CDN token requests. Combine CDN token requests for steamcontent.com. Added a diagnostic timeout for lost CDN token requests.