feat: add prune subcommand, drop archived/stale entries (#1441)

* feat: add prune subcommand, drop archived/stale entries, add container-explorer

Add a new `awesome-docker prune` subcommand that removes README entries
whose repository health status matches a configurable set (default:
archived,stale). URLs are read from the local health cache, or from a
markdown report file via --from-report when the cache is outdated.

Apply it against the issue #1439 health report to remove 5 entries
that survived the recent reorg: stitchocker, docker-consul,
blockbridge-docker-volume, docker-explorer, dockdash.

Add google/container-explorer in the Security section as the actively
maintained successor to the now-archived google/docker-explorer.

Co-Authored-By: Claude <noreply@anthropic.com>

* golangci-lint config

* fix: address golangci-lint findings

Fixes errcheck on bufio.Writer.WriteString, gocritic rangeValCopy via
indexed loops with pointer locals, gosec G703 on user-supplied CLI
output path, noctx by switching to exec.CommandContext with a timeout
in the TUI url opener, prealloc in the scorer test, plus fieldalignment
struct reorders and golines line breaks from --fix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

internal/linter/fixer.go

@@ -15,7 +15,9 @@ import (
 //	by [@author](url), by [@author][ref], by @author
 //
 // Also handles "Created by", "Maintained by" etc.
-var attributionRe = regexp.MustCompile(`\s+(?:(?:[Cc]reated|[Mm]aintained|[Bb]uilt)\s+)?by\s+\[@[^\]]+\](?:\([^)]*\)|\[[^\]]*\])\.?$`)
+var attributionRe = regexp.MustCompile(
+	`\s+(?:(?:[Cc]reated|[Mm]aintained|[Bb]uilt)\s+)?by\s+\[@[^\]]+\](?:\([^)]*\)|\[[^\]]*\])\.?$`,
+)
 
 // bareAttributionRe matches: by @author at end of line (no link).
 var bareAttributionRe = regexp.MustCompile(`\s+by\s+@\w+\.?$`)
@@ -136,13 +138,19 @@ func FixFile(path string) (int, error) {
 
 	w := bufio.NewWriter(out)
 	for i, line := range lines {
-		w.WriteString(line)
+		if _, err := w.WriteString(line); err != nil {
+			return 0, err
+		}
 		if i < len(lines)-1 {
-			w.WriteString("\n")
+			if _, err := w.WriteString("\n"); err != nil {
+				return 0, err
+			}
 		}
 	}
 	// Preserve trailing newline if original had one
-	w.WriteString("\n")
+	if _, err := w.WriteString("\n"); err != nil {
+		return 0, err
+	}
 	return fixCount, w.Flush()
 }
 
@@ -218,11 +226,17 @@ func SortFile(path string) (int, error) {
 
 	w := bufio.NewWriter(out)
 	for i, line := range lines {
-		w.WriteString(line)
+		if _, err := w.WriteString(line); err != nil {
+			return 0, err
+		}
 		if i < len(lines)-1 {
-			w.WriteString("\n")
+			if _, err := w.WriteString("\n"); err != nil {
+				return 0, err
+			}
 		}
 	}
-	w.WriteString("\n")
+	if _, err := w.WriteString("\n"); err != nil {
+		return 0, err
+	}
 	return fixCount, w.Flush()
 }