feat: add campaign manager entity

Author: iamsirenstorm

fgd/point/info/info_campaign_manager.fgd

@@ -0,0 +1,23 @@
+@PointClass base(BaseEntity)
+	iconsprite("editor/info_campaign_manager.vmt")
+= info_campaign_manager: "Management entity for campaign/workshop maps. Used to transition to other maps or change campaign state."
+	[
+
+	// Control Functions
+	input PreviousMap(void) : "Immediately load the previous map in the campaign script."
+	input NextMap(void) : "Immediately load the next map in the campaign script."
+	input MarkCampaignComplete(void) : "Mark the campaign as completed. Will unlock all chapters."
+	input ExitGame(void) : "Trigger the evaluation screen where a player can vote on your campaign/map."
+
+	// TODO: make campaign system handle non-linear stuff
+	// better before implementing this!
+	// ------------------------------------------------------
+	// Getter Functions
+	// input GetChapterProgress(void) : ""
+	// input GetCampaignProgress(void) : ""
+	// Setter Functions
+	// input SetChapterLockState(string) : ""
+	// Outputs
+	// output OnGetChapterProgress(int) : ""
+	// output OnGetCampaignProgress(int) : ""
+	]

hammer/materials/editor/info_campaign_manager.vmt

@@ -0,0 +1,8 @@
+Sprite
+{
+	$baseTexture "editor/info_campaign_manager"
+	$spriteorientation "vp_parallel"
+	$spriteorigin "[ 0.50 0.50 ]"
+	$spriterendermode 2
+	$no_fullbright 1
+}