Docs: Update CLI offline cmds (#8548)

* Docs: Update CLI usage

* Docs: Add script to generate offline command links

* Docs: Update list of commands supporting offline signing

* Docs: Omit deprecated `pay` command from offline command list

docs/offline-cmd-md-links.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+CLI_USAGE_RELPATH="../cli/usage.md"
+
+SED_OMIT_NONMATCHING=$'\nt\nd'
+SED_CMD="s:^#### solana-(.*):* [\`\\1\`](${CLI_USAGE_RELPATH}#solana-\\1):${SED_OMIT_NONMATCHING}"
+
+OFFLINE_CMDS=$(grep -E '#### solana-|--signer ' src/cli/usage.md | grep -B1 -- --signer | sed -Ee "$SED_CMD")
+
+# Omit deprecated
+grep -vE '\b(pay)\b' <<<"$OFFLINE_CMDS"