Revert "use global namespace"

This reverts commit 24c3a9abd3.

# Conflicts:
#	packages/core/src/Editor.ts

packages/core/src/extensions/commands.ts

@@ -147,10 +147,8 @@ export const Commands = Extension.create({
   },
 })
 
-declare global {
-  namespace Tiptap {
-    interface AllExtensions {
-      Commands: typeof Commands,
-    }
+declare module '@tiptap/core' {
+  interface AllExtensions {
+    Commands: typeof Commands,
   }
 }

packages/core/src/extensions/editable.ts

@@ -14,10 +14,8 @@ export const Editable = Extension.create({
   },
 })
 
-declare global {
-  namespace Tiptap {
-    interface AllExtensions {
-      Editable: typeof Editable,
-    }
+declare module '@tiptap/core' {
+  interface AllExtensions {
+    Editable: typeof Editable,
   }
 }

packages/core/src/extensions/focusEvents.ts

@@ -36,10 +36,8 @@ export const FocusEvents = Extension.create({
   },
 })
 
-declare global {
-  namespace Tiptap {
-    interface AllExtensions {
-      FocusEvents: typeof FocusEvents,
-    }
+declare module '@tiptap/core' {
+  interface AllExtensions {
+    FocusEvents: typeof FocusEvents,
   }
 }

packages/core/src/extensions/keymap.ts

@@ -45,10 +45,8 @@ export const Keymap = Extension.create({
   },
 })
 
-declare global {
-  namespace Tiptap {
-    interface AllExtensions {
-      Keymap: typeof Keymap,
-    }
+declare module '@tiptap/core' {
+  interface AllExtensions {
+    Keymap: typeof Keymap,
   }
 }