add SonarInfo msg type (#34)

* add SonarInfo msg type

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* add variables meters_per_pixel_x and meters_per_pixel_y

* fix: datatypes of Sonarinfo.msg

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: fnilsen1

msg/Landmark.msg

@@ -17,4 +17,4 @@ uint16 PIPELINE_END = 4
 
 # Landmark subtype:
 uint16 ARUCO_BOARD_CAMERA = 1
-uint16 ARUCO_BOARD_SONAR = 2
+uint16 ARUCO_BOARD_SONAR = 2

msg/SonarInfo.msg

@@ -0,0 +1,8 @@
+std_msgs/Header header
+uint32 height
+uint32 width
+float64 meters_per_pixel_x
+float64 meters_per_pixel_y
+float64 max_range
+float64 min_range
+float64 vertical_fov