Working dir should be the project folder and not the root folder for graphviz/dot

[dspaeth-breuni]

Observed vs. expected behavior

When I try to create a graph with graphviz and use an image for the node, with a relative path
within my project, then the image is not displayed.

This happens because the working dir is / instead of the project folder.

When I use the full path from root, for instance image="/User/demo/IdeaProjects/project/assets/pod.png",
then the image is displayed.

Steps to reproduce

No image shows up:

:graphvizdot: /opt/homebrew/bin/dot
[graphviz, "demo"]
---------------------------------------------------------------------
digraph "demo" {
	"5926cd0c520a4b8f84cc092088e27a46"	[height=1.9028,
					image="./assets/pod.png",
					label="",
					pos="392.5,1315.5",
					shape=none,
					width=1.4028];
	
}

---------------------------------------------------------------------

Environment

Plugin Version: 0.37.32
dot: 5.0.0 (20220707.1540)

IntelliJ Details:

IntelliJ IDEA 2022.1.3 (Ultimate Edition)
Build #IU-221.5921.22, built on June 21, 2022
...
Runtime version: 11.0.15+10-b2043.56 aarch64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
macOS 12.4
GC: G1 Young Generation, G1 Old Generation
Memory: 2048M
Cores: 10
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com.mnr.java.intellij.idea.plugin.base64helper (2.0.3)
com.jetbrains.jax.ws (221.5787.20)
org.asciidoctor.intellij.asciidoc (0.37.32)
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