docs(map_projection_loader): add projector type image (#7062)

* add map loader image

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

* add description

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

* modify notation

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

* style(pre-commit): autofix

* describe: what is the strict boundary

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

* style(pre-commit): autofix

* reflect review

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

* fix typo

Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>

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Signed-off-by: Kento Yabuuchi <kento.yabuuchi.2@tier4.jp>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: KYabuuchi

map/map_projection_loader/README.md

@@ -21,6 +21,10 @@ sample-map-rosbag
 └── pointcloud_map_metadata.yaml
 ```
 
+There are three types of transformations from latitude and longitude to XYZ coordinate system as shown in the figure below. Please refer to the following details for the necessary parameters for each projector type.
+
+![node_diagram](docs/map_projector_type.svg)
+
 ### Using local coordinate
 
 ```yaml