work on __resource -> fxmanifest and RDR compatibility

resources/[managers]/spawnmanager/fxmanifest.lua

@@ -0,0 +1,15 @@
+client_script 'spawnmanager.lua'
+
+export 'getRandomSpawnPoint'
+export 'spawnPlayer'
+export 'addSpawnPoint'
+export 'removeSpawnPoint'
+export 'loadSpawns'
+export 'setAutoSpawn'
+export 'setAutoSpawnCallback'
+export 'forceRespawn'
+
+fx_version 'adamant'
+games { 'rdr3', 'gta5' }
+
+rdr3_warning 'I acknowledge that this is a prerelease build of RedM, and I am aware my resources *will* become incompatible once RedM ships.'