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/xor-key-brute-force.md

@@ -0,0 +1,21 @@
+# Brute-Force XOR Key
+> Find the XOR key used to encode strings in a binary
+
+**Tools:** [[tools/brxor-py|brxor-py]], [[tools/bbcrack|bbcrack]], [[tools/xorsearch|xorsearch]], [[tools/xortool|xortool]]
+**FOR610 Lab:** 5.2
+
+## Commands
+```bash
+# Quick check for XOR-encoded URLs/PE headers
+XORSearch <file> http:
+# Brute-force single-byte XOR keys
+brxor.py <file>
+# Try XOR, ROL, ADD combinations
+bbcrack -l 1 <file>
+# Guess multi-byte XOR key length and value
+xortool <file>
+# Decode with known key
+xortool-xor -s '<key>' -i <encoded> -o <decoded>
+```
+
+#recipe #brxor-py #bbcrack #xorsearch #xortool