[TRNT-3946] Add MCP documentation

[antgamdia]

This PR updates the docs site to reflect the new addition: the Trento MCP Server. The changes have been taken from trento-project/mcp-server#62, but replacing some registries and using the document structure we have in this repo.

Instructions to build it locally

# Check out this repo: github.com/trento-project/docs
cd trento
asciidoctor --attribute="idprefix=id-@" --attribute="idseparator=-@"  --attribute env-daps=1 --attribute=data-uri! --attribute=imagesdir! --attribute=attribute-missing=warn --attribute=daps-adoc-attributes="env-daps=1" --backend=docbook5 --doctype=book --failure-level WARN --out-file=./trento/DC-SLES-SAP-trento/.adoc/SLES-SAP-trento.xml ./adoc/trento-guide.adoc
daps validate --remarks
daps html # generate web
daps pdf # generate pdf file

# Note, first you need: "zypper in asciidoctor daps"

[antgamdia]

Adding some offline suggestions I've received so far:

• Fix bad sections (b6228f2)
• Remove instructions for containers (TBD)
• Remove SUSE AI section, maybe just extract it to a blog post.

[EMaksy]

Hey @antgamdia , just for your info, i took over the task while your away :)