Generalize migration guide for any GRASP implementation

- Rename guide: migrate-ngit-relay-to-ngit-grasp.md → migrate-to-ngit-grasp.md
- Remove ngit-relay and relay.ngit.dev specific references
- Use generic terminology: source/target relay, current implementation
- Add Compatibility section explaining requirements
- Update examples to be implementation-agnostic
- Update script comments to reference GRASP relay (not ngit-relay)
- Update README.md to link to the new guide

Scripts already work with any GRASP implementation via parameters.

1 files changed, 2 insertions, 2 deletions

diff --git a/docs/how-to/migration-scripts/20-categorize.sh b/docs/how-to/migration-scripts/20-categorize.sh
index f47eb55..b38dc00 100755
--- a/docs/how-to/migration-scripts/20-categorize.sh
+++ b/docs/how-to/migration-scripts/20-categorize.sh
@@ -2,7 +2,7 @@
 #
 # 20-categorize.sh - Categorize git sync status into 4 categories
 #
-# PHASE 3a of the ngit-relay to ngit-grasp migration analysis pipeline.
+# PHASE 3a of the GRASP relay to ngit-grasp migration analysis pipeline.
 # Takes git-sync-status.tsv from Phase 2 and categorizes into 4 files.
 #
 # USAGE:
@@ -39,7 +39,7 @@
 # RUNTIME: < 1 second (local processing only)
 #
 # SEE ALSO:
-#   docs/how-to/migrate-ngit-relay-to-ngit-grasp.md - Full migration guide
+#   docs/how-to/migrate-to-ngit-grasp.md - Full migration guide
 #   10-check-git-sync.sh - Phase 2 script that produces input for this script
 #