docs: rebrand the repository documentation, templates and dashboards

README, README_ZH, SECURITY, COMPLIANCE, CONTRIBUTING, NOTICE,
code_of_conduct, the vulnerability and PR-etiquette documents, the GitHub issue
and pull request templates, and the docs/ tree all present Silo as the product.
The Grafana dashboards under docs/metrics/prometheus/grafana/ have their panel
titles and descriptions rebranded while every minio_* query, label and
expression is left alone, so existing alerts and recording rules keep matching.

The distinction the review demanded is applied per hit rather than by
search-and-replace:

- Product and command text becomes Silo and silo: install and run instructions,
  systemd examples, compose services, download links, badges.
- Protocol and interface text keeps MinIO: MINIO_* variables, minio_* metrics,
  x-minio-* headers, /minio/* routes, .minio.sys, arn:minio, and API field and
  error names.
- Attribution keeps MinIO and gains the fork's own: the AGPL obligations,
  original copyright, CREDITS and NOTICE stay, with the modification notice
  added alongside rather than replacing them.
- Historical and third-party references are left as facts, not rewritten for
  brand tidiness.

README and README_ZH each carry an explicit non-affiliation notice, document
the side-by-side package migration including the
/etc/systemd/system/silo.service.d/10-legacy-user.conf drop-in for keeping a
legacy UID/GID, and state that recursive chown is never performed. The trademark
attribution uses the policy's approved "based on MinIO technology" wording, not
the shortened form the policy rejects.

github.com/pgsty/minio links are left in place and labelled transitional. The
repository has not been renamed, and rewriting them now would produce documented
URLs that 404 until the cutover; they change in the cutover commit together with
the goreleaser release target, the OCI source label and the raw-content branch.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/sts/custom-token-identity.go

@@ -33,7 +33,7 @@ import (
 )
 
 var (
-	// LDAP integrated Minio endpoint
+	// Identity-provider-integrated Silo endpoint
 	stsEndpoint string
 
 	// token to use with AssumeRoleWithCustomToken
@@ -95,7 +95,7 @@ func main() {
 		return
 	}
 
-	// Use generated credentials to authenticate with MinIO server
+	// Use generated credentials to authenticate with Silo server
 	stsEndpointURL, err := url.Parse(stsEndpoint)
 	if err != nil {
 		log.Fatalf("Error parsing sts endpoint: %v", err)
@@ -109,7 +109,7 @@ func main() {
 		log.Fatalf("Error initializing client: ", err)
 	}
 
-	// Use minIO Client object normally like the regular client.
+	// Use the minio-go Client object like a regular client.
 	fmt.Printf("Calling list objects on bucket named `%s` with temp creds:\n===\n", bucketToList)
 	objCh := minioClient.ListObjects(context.Background(), bucketToList, minio.ListObjectsOptions{})
 	for obj := range objCh {