Add markdown wiki with 473 pages and zk browser

Generate interlinked wiki from master inventory: 397 tool pages,
15 workflow pages, 27 recipe pages, 33 category pages, plus index.
All pages use [[wiki-links]] for cross-navigation between tools,
workflows, recipes, and categories (1782 links total).

Install zk for interactive browsing with fzf search, tag filtering,
and backlink discovery. Add 'fhelp wiki' command and Makefile target.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

data/generated/wiki/tools/nc.md

@@ -0,0 +1,23 @@
+# nc
+> Network utility for reading/writing data across TCP/UDP connections
+
+**Category:** [[categories/explore-network-interactions-connecting|Explore Network Interactions > Connecting]] | **Tier:** Rich (FOR610)
+**Docs:** [https://docs.remnux.org/discover-the-tools/explore+network+interactions/connecting](https://docs.remnux.org/discover-the-tools/explore+network+interactions/connecting)
+
+## Usage
+```bash
+nc -l -p 3127
+nc target_ip 80
+```
+
+## Related Tools
+- [[tools/anomy|anomy]] — A wrapper around wget, ssh, sftp, ftp, and telnet to route t
+- [[tools/curl|curl]] — Transfer data to/from servers using various protocols
+- [[tools/epic-irc-client|EPIC IRC Client]] — Examine IRC activities with this IRC client.
+- [[tools/gnu-wget|GNU Wget]] — Interact with servers via HTTP, HTTPS, FTP, and FTPS using t
+- [[tools/thug|Thug]] — Low-interaction honeyclient for analyzing malicious websites
+
+## FOR610
+**Sections:** 1
+
+#network #tcp #listener