Move pages under tldr, lint run.sh, update docs

tldr/gnmic-subscribe

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gnmic subscribe
+
+> Subscribe to a gnmic network device state updates.
+> More information: <https://gnmic.kmrd.dev/cmd/subscribe>.
+
+- Subscribe to target state updates under the subtree of a specific path:
+
+`gnmic --address {{ip:port}} subscribe --path {{path}}`
+
+- Subscribe to a target with a sample interval of 30s (default is 10s):
+
+`gnmic -a {{ip:port}} subscribe --path {{path}} --sample-interval 30s`
+
+- Subscribe to a target with sample interval and updates only on change:
+
+`gnmic -a {{ip:port}} subscribe --path {{path}} --stream-mode on-change --heartbeat-interval 1m`
+
+- Subscribe to a target for only one update:
+
+`gnmic -a {{ip:port}} subscribe --path {{path}} --mode once`
+
+- Subscribe to a target and specify response encoding (json_ietf):
+
+`gnmic -a {{ip:port}} subscribe --path {{path}} --encoding json_ietf`