docs: move kernel configs page from wiki

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+# Linux kernel configs
+
+List of recommended kernel configs for `syzkaller`:
+
+## Syzkaller features
+
+To enable coverage collection, which is extremely important for effective fuzzing:
+```
+CONFIG_KCOV=y
+CONFIG_KCOV_INSTRUMENT_ALL=y
+CONFIG_DEBUG_FS=y
+```
+
+To show code coverage in web interface:
+```
+CONFIG_DEBUG_INFO=y
+```
+
+For `namespace` sandbox:
+```
+CONFIG_NAMESPACES=y
+CONFIG_USER_NS=y
+CONFIG_UTS_NS=y
+CONFIG_IPC_NS=y
+CONFIG_PID_NS=y
+CONFIG_NET_NS=y
+```
+
+If your kernel doesn't have commits [arm64: setup: introduce kaslr_offset()](https://github.com/torvalds/linux/commit/7ede8665f27cde7da69e8b2fbeaa1ed0664879c5)
+ and [kcov: make kcov work properly with KASLR enabled](https://github.com/torvalds/linux/commit/4983f0ab7ffaad1e534b21975367429736475205), disable the following config:
+```
+# CONFIG_RANDOMIZE_BASE is not set
+```
+
+## Bug detection configs
+
+`KASAN` for use-after-free and out-of-bounds detection:
+```
+CONFIG_KASAN=y
+CONFIG_KASAN_INLINE=y
+```
+
+Any other debugging configs, the more the better, here are some that proved to be especially useful:
+```
+CONFIG_LOCKDEP=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_PROVE_RCU=y
+CONFIG_DEBUG_VM=y
+```
+
+Increase RCU stall timeout to reduce false positive rate:
+```
+CONFIG_RCU_CPU_STALL_TIMEOUT=60
+```