Initial ROCm-docs (#92)

* Initial ROCm-docs commit

Co-authored-by: Aurélien Bouteiller <bouteill@icl.utk.edu>
Co-authored-by: Alex Xu <alex.xu@amd.com>
Co-authored-by: yugang-amd <yugang.wang@amd.com>

docs/api/ctx.rst

@@ -0,0 +1,40 @@
+.. meta::
+  :description: rocSHMEM intra-kernel networking runtime for AMD dGPUs on the ROCm platform.
+  :keywords: rocSHMEM, API, ROCm, documentation, HIP, Networking, Communication
+
+.. _rocshmem-api-ctx:
+
+-----------------------------------
+Context Management Routines
+-----------------------------------
+
+ROCSHMEM_CTX_CREATE
+-------------------
+
+.. cpp:function:: __device__ int rocshmem_wg_ctx_create(int64_t options, rocshmem_ctx_t *ctx)
+.. cpp:function:: __device__ int rocshmem_wg_team_create_ctx(rocshmem_team_t team, long options, rocshmem_ctx_t *ctx)
+        
+  :param team:    Team handle to derive the context from
+  :param options: Options for context creation (Ignored in current design, please use a value of 0)
+  :param ctx:     Context handle
+ 
+  :returns:       All threads returns 0 if the context was created successfully;
+                  If any thread returns non-zero value, the operation failed and a higher number of
+                  `ROCSHMEM_MAX_NUM_CONTEXTS` is required
+
+**Description:**
+Creates an OpenSHMEM context. By design, the context is private to the calling work-group.
+Must be called collectively by all threads in the work-group.
+
+ROCSHMEM_CTX_DESTROY
+--------------------
+
+.. cpp:function:: __device__ void rocshmem_wg_ctx_destroy(rocshmem_ctx_t *ctx)
+
+  :param ctx:     Context handle
+
+  :returns:       None
+
+**Description:**
+Destroys an rocSHMEM context.
+Must be called collectively by all threads in the work-group.