isPluginCompatible for flipper-server-core

Summary:
Yet another implementation of this function.

References:
https://www.internalfb.com/code/fbsource/[85c1fe5afee7]/xplat/sonar/desktop/flipper-frontend-core/src/utils/isPluginCompatible.tsx?lines=14
https://www.internalfb.com/code/fbsource/[85c1fe5afee7]/xplat/sonar/desktop/flipper-ui-core/src/utils/isPluginCompatible.tsx?lines=15

This one:
- Uses GK from the existing server config
- Gets version from the existing server config

It differs in:
- appVersion not passed in as argument
- Doesn't use RenderHost to obtain the server config

I think, this is acceptable as the function body is effectively the conditional, that depends on the caller available dependencies.

Reviewed By: passy

Differential Revision: D37749761

fbshipit-source-id: 3094e87c7770ac66e5764c932a0a0d4e7f5b63f5

desktop/flipper-server-core/package.json

@@ -37,6 +37,7 @@
     "rsocket-flowable": "^0.0.27",
     "rsocket-tcp-server": "^0.0.25",
     "rsocket-types": "^0.0.25",
+    "semver": "^7.3.7",
     "serialize-error": "^8.1.0",
     "split2": "^4.1.0",
     "tmp": "^0.2.1",