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/recipes/rtf-shellcode-extraction.md

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+# Extract Shellcode from RTF Document
+> Find and extract embedded shellcode from a malicious RTF file
+
+**Tools:** [[tools/rtfdump-py|rtfdump-py]], [[tools/xorsearch|xorsearch]], [[tools/scdbgc|scdbgc]]
+**FOR610 Lab:** 3.5
+
+## Commands
+```bash
+# Scan RTF structure — look for groups with lots of hex data
+rtfdump.py <document.rtf>
+# Extract the hex-heavy group as binary
+rtfdump.py <document.rtf> -s <group_num> -H -d > extracted.bin
+# Scan for shellcode patterns (even XOR-encoded)
+XORSearch -W -d 3 extracted.bin
+# Emulate shellcode at found offset
+scdbgc /f extracted.bin /foff <offset> /s -1
+```
+
+#recipe #rtfdump-py #xorsearch #scdbgc