Move devices to server folder

Summary:
This is the first of many diffs that extracts the connection, device, client detection out of the flipper core, to create a reusable flipper-server library that can be used in e.g. flipper-dump.

To keep diffs a little smaller, the current connection logic is first moved to the `server/` directory, and decoupled manually from the rest of the core, before moving it over to a separate package.

This first diffs moves the `comms/`, `devices/` and certificate utilities to the `server` directory.

Further untangling will follow in next diffs

Reviewed By: timur-valiev

Differential Revision: D30246551

fbshipit-source-id: c84259bfb1239119b3267a51b015e30c3c080866

desktop/app/src/utils/pluginUtils.tsx

@@ -10,7 +10,7 @@
 import type {PluginDefinition} from '../plugin';
 import type {State} from '../reducers';
 import type {State as PluginsState} from '../reducers/plugins';
-import type BaseDevice from '../devices/BaseDevice';
+import type BaseDevice from '../server/devices/BaseDevice';
 import type Client from '../Client';
 import type {
   ActivatablePluginDetails,
@@ -19,6 +19,7 @@ import type {
   PluginDetails,
 } from 'flipper-plugin-lib';
 import {getLatestCompatibleVersionOfEachPlugin} from '../dispatcher/plugins';
+import {getPluginKey} from './pluginKey';
 
 export type PluginLists = {
   devicePlugins: PluginDefinition[];
@@ -63,25 +64,6 @@ export function pluginsClassMap(
   ]);
 }
 
-export function getPluginKey(
-  selectedAppId: string | null | undefined,
-  baseDevice: {serial: string} | null | undefined,
-  pluginID: string,
-): string {
-  if (selectedAppId) {
-    return `${selectedAppId}#${pluginID}`;
-  }
-  if (baseDevice) {
-    // If selected App is not defined, then the plugin is a device plugin
-    return `${baseDevice.serial}#${pluginID}`;
-  }
-  return `unknown#${pluginID}`;
-}
-
-export const pluginKey = (serial: string, pluginName: string): string => {
-  return `${serial}#${pluginName}`;
-};
-
 export function computeExportablePlugins(
   state: Pick<State, 'plugins' | 'connections' | 'pluginMessageQueue'>,
   device: BaseDevice | null,