[DOCS] Move find file structure to a new API endpoint (#67314)

Author: lcawl

docs/reference/ml/anomaly-detection/apis/find-file-structure.asciidoc

@@ -6,7 +6,7 @@
 <titleabbrev>Find file structure</titleabbrev>
 ++++
 
-experimental[]
+deprecated::[7.12.0,Replaced by <<find-structure>>]
 
 Finds the structure of a text file. The text file must contain data that is
 suitable to be ingested into {es}.

docs/reference/rest-api/index.asciidoc

@@ -19,6 +19,7 @@ not be included yet.
 * <<docs, Document APIs>>
 * <<enrich-apis,Enrich APIs>>
 * <<graph-explore-api,Graph Explore API>>
+* <<find-structure>>
 * <<indices, Index APIs>>
 * <<index-lifecycle-management-api,Index lifecycle management APIs>>
 * <<ingest-apis,Ingest APIs>>
@@ -48,6 +49,7 @@ include::{es-repo-dir}/ccr/apis/ccr-apis.asciidoc[]
 include::{es-repo-dir}/data-streams/data-stream-apis.asciidoc[]
 include::{es-repo-dir}/docs.asciidoc[]
 include::{es-repo-dir}/ingest/apis/enrich/index.asciidoc[]
+include::{es-repo-dir}/text-structure/apis/find-structure.asciidoc[leveloffset=+1]
 include::{es-repo-dir}/graph/explore.asciidoc[]
 include::{es-repo-dir}/indices.asciidoc[]
 include::{es-repo-dir}/ilm/apis/ilm-api.asciidoc[]