chore: tidy comments that repeat the code or no longer match it (#72)

- Comments that only restate a name (sgr, fg, mdLink, the repo provider's starred and current-repo notes) are gone.
- Stale ones match the code again: the repo package covers plain env files too, Launch runs argv, closeVersions no longer claims to move the cursor, and Check's fallback says why rather than naming a state no release had.
- The doc for versionString was attached to pseudo; the backtick in SourcesView's doc was a string-concatenation leftover; openFailed's doc was garbled.
- recentReleases sits next to latest, its user.
- .gitignore drops the Go template's boilerplate and patterns for files this project doesn't make.

Reviewed-on: #72
Co-authored-by: Karl-Einar Bergstrøm <karl-einarb@outlook.com>

internal/provider/repo/repo.go

@@ -1,6 +1,6 @@
 // Package repo browses the encrypted secret files in git repositories:
 // a repo is a source, its secret files the containers (vault level), and
-// their keys the secrets. SOPS files are the one type so far.
+// their keys the secrets. Secret files are SOPS files and plain env files.
 //
 // Listing never decrypts: SOPS encrypts values only, so a file's keys and
 // metadata are read directly. A value is decrypted when it's revealed or
@@ -106,8 +106,6 @@ func (p *Provider) load() {
 				roots = append(roots, root)
 			}
 		}
-		// The repo lazysecrets started in, if any: marked, so the UI can
-		// put it on top, with its files under Dir first.
 		here, inRepo := p.current()
 		if inRepo {
 			seen[here.root] = true
@@ -137,7 +135,6 @@ func (p *Provider) load() {
 				add(root)
 			}
 		}
-		// Repos you starred something in, wherever they are.
 		for _, dir := range p.s.Starred {
 			if root, err := gitRoot(dir); err == nil {
 				add(root)