SSH aliasing to custom remote URL

**Is your feature request related to a problem? Please describe.**
My github repo is cloned using an SSH alias, i.e.

```
Host github-mycompany
HostName github.com
User git
IdentityFile ~/.ssh/mycompany
```

As a result, the extension doesn't seem to know that my directory points to a github repository

**Describe the solution you'd like**
Support remote definitions. For example, gitlens solves this with a configuration:

```
"gitlens.remotes": [
{
"regex": "github-mycompany",
"type": "Custom",
"urls": {
"repository": "https://github.com/${repoBase}/${repoPath}",
"branches": "https://github.com/${repoBase}/${repoPath}/branches",
"branch": "https://github.com/${repoBase}/${repoPath}/commits/${branch}",
"commit": "https://github.com/${repoBase}/${repoPath}/commit/${id}",
"file": "https://github.com/${repoBase}/${repoPath}?path=${file}${line}",
"fileInBranch": "https://github.com/${repoBase}/${repoPath}/blob/${branch}/${file}${line}",
"fileInCommit": "https://github.com/${repoBase}/${repoPath}/blob/${id}/${file}${line}",
"fileLine": "#L${line}",
"fileRange": "#L${start}-L${end}"
}
}
],
```

Although I don't need anything this advanced. Even something like this would suffice:

```
"github-actions.remote-url": "https://github.com/mycompany"
```

No files or tests are named. Start by tracing how the extension detects GitHub remotes and builds repository links, then compare that flow with the SSH alias and custom remote examples in the issue. Done means a configured SSH alias is recognized and generated links resolve to the intended GitHub repository.

Escrita pelo modelo de indexação a partir do texto da issue.