Moved console-specific stuff to its own namespace

this stuff has different functionality than everything else in the
command namespace (specifically console handling), so it doesn't belong
in here.

I know that this will probably break some plugins, but I don't care,
because plugins shouldn't have been abusing ConsoleCommandSender in the
first place.

tests/phpstan/configs/actual-problems.neon

@@ -6,7 +6,7 @@ parameters:
 			path: ../../../src/CrashDump.php
 
 		-
-			message: "#^Instanceof between pocketmine\\\\command\\\\CommandReaderThread and pocketmine\\\\command\\\\CommandReaderThread will always evaluate to true\\.$#"
+			message: "#^Instanceof between pocketmine\\\\console\\\\CommandReaderThread and pocketmine\\\\console\\\\CommandReaderThread will always evaluate to true\\.$#"
 			count: 1
 			path: ../../../src/Server.php
 

tests/phpstan/configs/l7-baseline.neon

@@ -436,9 +436,9 @@ parameters:
 			path: ../../../src/block/tile/TileFactory.php
 
 		-
-			message: "#^Property pocketmine\\\\command\\\\CommandReader\\:\\:\\$stdin \\(resource\\) does not accept resource\\|false\\.$#"
+			message: "#^Property pocketmine\\\\console\\\\CommandReader\\:\\:\\$stdin \\(resource\\) does not accept resource\\|false\\.$#"
 			count: 1
-			path: ../../../src/command/CommandReader.php
+			path: ../../../src/console/CommandReader.php
 
 		-
 			message: "#^Only booleans are allowed in an if condition, int\\|false given\\.$#"

tests/phpstan/configs/phpstan-bugs.neon

@@ -3,7 +3,7 @@ parameters:
 		-
 			message: "#^Call to function is_resource\\(\\) with resource will always evaluate to true\\.$#"
 			count: 2
-			path: ../../../src/command/CommandReader.php
+			path: ../../../src/console/CommandReader.php
 
 		-
 			message: "#^Method pocketmine\\\\crafting\\\\CraftingManager\\:\\:getDestructorCallbacks\\(\\) should return pocketmine\\\\utils\\\\ObjectSet\\<Closure\\(\\)\\: void\\> but returns pocketmine\\\\utils\\\\ObjectSet\\<Closure\\(\\)\\: void\\>\\|pocketmine\\\\utils\\\\ObjectSet\\<object\\>\\.$#"