Refactor gdscript-eglot-contact #78

Job	Run time
test (ubuntu-latest, 26.3, false)	40s
test (ubuntu-latest, 27.2, false)	46s
test (ubuntu-latest, 28.2, false)	45s
test (ubuntu-latest, 29.4, false)	47s
test (macos-latest, 28.2, false)	1m 19s
test (macos-latest, 29.4, false)	1m 31s
test (windows-latest, 26.3, false)	4m 51s
test (windows-latest, 27.2, false)	1m 58s
test (windows-latest, 28.2, false)	2m 4s
test (windows-latest, 29.4, false)	2m 27s
test (ubuntu-latest, snapshot, true)	35s
test (macos-latest, snapshot, true)	1m 16s
test (windows-latest, snapshot, true)	1m 33s
	20m 32s

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