doc: graph: add document for GenIndex and GreaterEqual

doc/graph/operations/GenIndex.md

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+GenIndex{#dev_guide_op_genindex}
+================================
+
+## General
+
+The GenIndex operation creates an index tensor along a specified axis of
+an input tensor. The resulting index tensor has the same shape as the
+input tensor, with each element representing the index along the
+specified axis.
+
+## Operation attributes
+
+| Attribute Name                                               | Description                                                | Value Type | Supported Values         | Required or Optional |
+|:-------------------------------------------------------------|:-----------------------------------------------------------|:-----------|:-------------------------|:---------------------|
+| [axis] (@ref dnnl::graph::op::attr::axis) | Specifies the dimension along which index values are generated. | s64   | An s64 value in the range of [-r, r-1] where r = rank(src) | Required    |
+
+## Execution Arguments
+
+### Input
+
+| Index | Argument Name | Required or Optional |
+|:------|:--------------|:---------------------|
+| 0     | `src`         | Required             |
+
+### Output
+
+| Index | Argument Name | Required or Optional |
+|:------| --------------|:---------------------|
+| 0     | `dst`         | Required             |
+
+## Supported Data Types
+
+The GenIndex operation supports the following data type combinations.
+
+| Src    | Dst    |
+|:-------|:-------|
+| f32    | s32    |
+| bf16   | s32    |
+| f16    | s32    |

doc/graph/operations/GreaterEqual.md

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+GreaterEqual{#dev_guide_op_greaterequal}
+========================================
+
+## General
+
+The GreaterEqual operation performs an element-wise greater-than-or-equal
+comparison between two given tensors. This operation applies
+the multi-directional broadcast rules to ensure compatibility between
+the tensors of different shapes.
+
+\f[ dst = \begin{cases} true & \text{if}\ src_0 \ge src_1 \\
+    false & \text{if}\ src_0 < src_1 \end{cases} \f]
+
+## Operation Attributes
+
+| Attribute Name                                               | Description                                                | Value Type | Supported Values         | Required or Optional |
+|:-------------------------------------------------------------|:-----------------------------------------------------------|:-----------|:-------------------------|:---------------------|
+| [auto_broadcast](@ref dnnl::graph::op::attr::auto_broadcast) | Specifies rules used for auto-broadcasting of src tensors. | string      | `none`,`numpy` (default) | Optional             |
+
+## Execution Arguments
+
+### Input
+
+| Index | Argument Name | Required or Optional |
+|:------|:--------------|:---------------------|
+| 0     | `src_0`       | Required             |
+| 1     | `src_1`       | Required             |
+
+@note Both src shapes should match and no auto-broadcasting is allowed if
+the `auto_broadcast` attribute is `none`. `src_0` and `src_1` shapes can be
+different and auto-broadcasting is allowed if the `auto_broadcast` attribute
+is `numpy`. Broadcasting is performed according to `auto_broadcast` value.
+
+### Output
+
+| Index | Argument Name | Required or Optional |
+|:------| --------------|:---------------------|
+| 0     | `dst`         | Required             |
+
+## Supported Data Types
+
+The GreaterEqual operation supports the following data type combinations.
+
+| Src_0 / Src_1 | Dst      |
+|:--------------|:---------|
+| f32           | boolean  |
+| bf16          | boolean  |
+| f16           | boolean  |
+| s32           | boolean  |