chore: add eso tools page (#3870)

Signed-off-by: Sn0rt <wangguohao.2009@gmail.com>
Co-authored-by: Gustavo Fernandes de Carvalho <17139678+gusfcarvalho@users.noreply.github.com>

docs/eso-tools.md

@@ -0,0 +1,7 @@
+# ESO Tools
+
+This page lists tools that are useful for working with External Secrets Operator. help you work with External Secrets Operator better.
+
+## [secret2es](https://github.com/Sn0rt/secret2es)
+
+This tool allows administrators to migrate secrets originally created by argocd-vault-plugin to external-secrets ES object.

hack/api-docs/mkdocs.yml

@@ -140,3 +140,4 @@ nav:
           - Talks: eso-talks.md
           - Demos: eso-demos.md
           - Blogs: eso-blogs.md
+          - Tools: eso-tools.md