gau: add page (#12489)

* gau: add page

* gau: remove trailing empty line

* gau: add additional information about gau

* gau: fix capitalization

* Update pages/common/gau.md

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/gau.md

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/gau.md

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/gau.md

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

* Update pages/common/gau.md

---------

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

pages/common/gau.md

@@ -0,0 +1,32 @@
+# gau
+
+> Get All URLs: fetch known URLs from AlienVault's Open Threat Exchange, the Wayback Machine, and Common Crawl for any domains.
+> More information: <https://github.com/lc/gau>.
+
+- Fetch all URLs of a domain from AlienVault's Open Threat Exchange, the Wayback Machine, Common Crawl, and URLScan:
+
+`gau {{example.com}}`
+
+- Fetch URLs of multiple domains:
+
+`gau {{domain1 domain2 ...}}`
+
+- Fetch all URLs of several domains from an input file, running multiple threads:
+
+`gau --threads {{4}} < {{path/to/domains.txt}}`
+
+- Write [o]utput results to a file:
+
+`gau {{example.com}} --o {{path/to/found_urls.txt}}`
+
+- Search for URLs from only one specific provider:
+
+`gau --providers {{wayback|commoncrawl|otx|urlscan}} {{example.com}}`
+
+- Search for URLs from multiple providers:
+
+`gau --providers {{wayback,otx,...}} {{example.com}}`
+
+- Search for URLs within specific date range:
+
+`gau --from {{YYYYMM}} --to {{YYYYMM}} {{example.com}}`