[project] Lose the battle between tabs & spaces

I'm a tabs guy. I like tabs, it's an elegant way to represent
indentation instead of brute-forcing it. But I have to admit that the
world seems to be going towards spaces, and tooling tends not to play
nice with tabs. So here we go, changing the whole repo to spaces since
I'm getting tired of all the inconsistent formatting.

src/include/j6/init.h

@@ -5,33 +5,33 @@
 #include <stdint.h>
 #include "j6/types.h"
 
-enum j6_init_type {					// `value` is a:
-	j6_init_handle_self,			// Handle to the system
-	j6_init_handle_other,			// Handle to this process
-	j6_init_desc_framebuffer		// Pointer to a j6_init_framebuffer descriptor
+enum j6_init_type {                 // `value` is a:
+    j6_init_handle_self,            // Handle to the system
+    j6_init_handle_other,           // Handle to this process
+    j6_init_desc_framebuffer        // Pointer to a j6_init_framebuffer descriptor
 };
 
 struct j6_typed_handle {
-	enum j6_object_type type;
-	j6_handle_t handle;
+    enum j6_object_type type;
+    j6_handle_t handle;
 };
 
 struct j6_init_value {
-	enum j6_init_type type;
-	union {
-		struct j6_typed_handle handle;
-		void *data;
-	};
+    enum j6_init_type type;
+    union {
+        struct j6_typed_handle handle;
+        void *data;
+    };
 };
 
 /// Structure defining a framebuffer.
 /// `flags` has the following bits:
 ///   0-3:   Pixel layout. 0000: rgb8, 0001: bgr8
 struct j6_init_framebuffer {
-	uintptr_t addr;
-	size_t size;
-	uint32_t vertical;
-	uint32_t horizontal;
-	uint32_t scanline;
-	uint32_t flags;
+    uintptr_t addr;
+    size_t size;
+    uint32_t vertical;
+    uint32_t horizontal;
+    uint32_t scanline;
+    uint32_t flags;
 };