docs: add batch gateway XKS deployment guide (#93)

* docs: add batch gateway AKS deployment guide

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: deploy inference workloads in the llm namespace

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: address PR review feedback on RHAIIS install and manifests

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: move AKS section from deploy-k8s.md to deploy-aks.md

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: mount secrets to llm namespace

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: fix Kuadrant rate limit identity config in deploy-aks guide

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: make the doc generic for xks

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: address PR review feedback

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: add CKS support and polish improvements to xKS batch guide

  - Add CKS prerequisite note (NVIDIA device plugin pre-installed)
  - Add CKS Kuadrant alternative (RHCL via helmfile + RBAC fix)
  - Add RHCL rate limiting known issue (wasm-shim bug in 1.4.0)
  - Add EPP RBAC fix for llm-d.ai API group (CKS-specific)
  - Rename §5 to Platform-Specific, add CKS subsection (storage, GPU, PKI, monitoring)
  - Add CKS troubleshooting rows (Kuadrant RBAC, EPP RBAC, CRD conflicts)
  - Pin Redis (27.0.14) and PostgreSQL (18.7.12) chart versions
  - Add MinIO emptyDir production warning
  - Quote MinIO placeholder variables
  - Drop skopeo from CLI prerequisites (not needed)
  - Fix pull secret filename (pull-secret.json, registry.redhat.io)

Signed-off-by: Madhu Goutham Reddy Ambati <mambati@redhat.com>

* docs: refecator sections and address review comments

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: marks kuadrant as optional

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: route xKS batch-llm via InferencePool and align model URI

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: remove CKS gotcha related to RHCL1.2.0

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>

* docs: remove remaining RHCL workarounds (known issue + troubleshooting row)

  Known issue (RHCL wasm plugin) and Kuadrant RBAC troubleshooting row
  are no longer needed — fixed in RHCL >= 1.3.0.

Signed-off-by: Madhu Goutham Reddy Ambati <mambati@redhat.com>

---------

Signed-off-by: Vishwanath Suresh <vsuresh@redhat.com>
Signed-off-by: Madhu Goutham Reddy Ambati <mambati@redhat.com>
Co-authored-by: Madhu Goutham Reddy Ambati <mambati@redhat.com>

Author: vishbhat