Add GOST (GO Simple Tunnel) v2 & v3

[amirsaam]

☑️ Self Check before Merge

• I have tested the template using the method described in README.md thoroughly
• I have ensured that I put as much default values as possible (except passwords) to ensure minimum effort required for end users to get started.
• I have ensured that I am not using the "latest" tag as this tag is dynamically changing and might break the one-click app. Use a fixed version.
• I have made sure that instructions.start and instructions.end are clear and self-explanatory.
• Icon is added as a png file to the logos directory.
• I've executed the checks if necessary by running npm ci && npm run validate_apps && npm run formatter (If failling run the prettier: npm run formatter-write)
• I will take responsibility addressing any issues that arises as a result of this PR (maintaining this app).

[githubsaturn]

Build is failing. Make sure the file extensions are .yml - You can manually run validator and formatter to make sure the build passes.

[amirsaam]

@githubsaturn that was my mistake, fixed it.

[githubsaturn]

Build is still failing. Make sure to run npm run formatter-write and it'll take care of formatting.

[amirsaam]

@githubsaturn build should be fixed by now, sorry for being a newbie

[githubsaturn]

Thanks!