feat: Updating flamegraph docs (#13299)

* Updating flamegraph

Author: jonathanc-n

docs/source/library-user-guide/profiling.md

@@ -21,8 +21,6 @@
 
 The section contains examples how to perform CPU profiling for Apache DataFusion on different operating systems.
 
-## MacOS
-
 ### Building a flamegraph
 
 [Video: how to CPU profile DataFusion with a Flamegraph](https://youtu.be/2z11xtYw_xs)
@@ -34,31 +32,47 @@ in images such as this:
 
 ![Flamegraph](../_static/images/flamegraph.svg)
 
-To create a flamegraph, you need to install the `flamegraph` tool:
+## MacOS
+
+#### Step 1: Install the flamegraph Tool
+
+To install flamegraph, run:
 
 ```shell
 cargo install flamegraph
 ```
 
-Then you can run the flamegraph tool with the `--` separator to pass arguments
-to the binary you want to profile.
+#### Step 2: Prepare Your Environment
+
+Ensure that you're in the directory containing the necessary data files for your DataFusion query. The flamegraph tool will profile the execution of your query against this data.
+
+#### Step 3: Running the Flamegraph Tool
+
+To generate a flamegraph, you'll need to use the -- separator to pass arguments to the binary you're profiling. For datafusion-cli, you need to make sure to run the command with sudo permissions (especially on macOS, where DTrace requires elevated privileges).
+
+Here is a general example:
+
+```shell
+sudo flamegraph -- datafusion-cli -f <path_to_sql_file/sql_file.sql>
+```
+
+#### Example: Generating a Flamegraph for a Specific Query
 
-Example: Flamegraph for `datafusion-cli` executing `q28.sql`. Note this
-must be run as root on Mac OSx to access DTrace.
+Here is an example using `28.sql`:
 
 ```shell
-sudo flamegraph -- datafusion-cli -f q28.sql
+sudo flamegraph -- datafusion-cli -f 28.sql
 ```
 
 You can also invoke the flamegraph tool with `cargo` to profile a specific test or benchmark.
 
-Example: Flamegraph for a specific test:
+#### Example: Flamegraph for a specific test:
 
 ```bash
 CARGO_PROFILE_RELEASE_DEBUG=true cargo flamegraph --root --unit-test datafusion  -- dataframe::tests::test_array_agg
 ```
 
-Example: Flamegraph for a benchmark
+#### Example: Flamegraph for a benchmark
 
 ```bash
 CARGO_PROFILE_RELEASE_DEBUG=true cargo flamegraph --root --bench sql_planner -- --bench