Add support for inputs from controller ports 2-4 (#141)

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Title sums it up

## Description
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Adds some extra logic in the controller polling to read from ports 2-4,
letting those controllers input on the menu.

## Motivation and Context
<!--- What does this sample do? What problem does it solve? -->
<!--- If it fixes/closes/resolves an open issue, please link to the
issue here -->
Port 1 no longer feels alone in the dark, cold world of menu selection.

## How Has This Been Tested?
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to -->
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Same method I used for libdragon's error screen which had the same
issue. Tested on a system with four controllers inserted.

## Screenshots
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## Types of changes
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the boxes that apply: -->
- [x] Improvement (non-breaking change that adds a new feature)
- [ ] Bug fix (fixes an issue)
- [ ] Breaking change (breaking change)
- [ ] Documentation Improvement
- [ ] Config and build (change in the configuration and build system,
has no impact on code or features)

## Checklist:
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that apply. -->
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here to help! -->
- [x] My code follows the code style of this project.
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [ ] All new and existing tests passed.

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Signed-off-by: FazanaJ <GITHUB_USER_EMAIL>

---------

Co-authored-by: Robin Jones <[email protected]>

docs/00_getting_started_sd.md

@@ -36,7 +36,7 @@ SD:\
 │   │    ├── NDDJ2.n64
 │   │    └── NDXJ0.n64
 │   │    
-│   └── emulators
+│   └── emulators\
 │        ├── neon64bu.rom
 │        ├── sodium64.z64
 │        ├── gb.v64

src/menu/actions.c

@@ -25,8 +25,17 @@ static void actions_clear (menu_t *menu) {
 }
 
 static void actions_update_direction (menu_t *menu) {
-    joypad_8way_t held_dir = joypad_get_direction(JOYPAD_PORT_1, JOYPAD_2D_DPAD | JOYPAD_2D_STICK);
-    joypad_8way_t fast_dir = joypad_get_direction(JOYPAD_PORT_1, JOYPAD_2D_C);
+    joypad_8way_t held_dir;
+    joypad_8way_t fast_dir;
+
+    JOYPAD_PORT_FOREACH (i) {
+        held_dir = joypad_get_direction(i, JOYPAD_2D_DPAD | JOYPAD_2D_STICK);
+        fast_dir = joypad_get_direction(i, JOYPAD_2D_C);
+        if (held_dir != JOYPAD_8WAY_NONE || fast_dir != JOYPAD_8WAY_NONE) {
+            break;
+        }
+    }
+
 
     if (fast_dir != JOYPAD_8WAY_NONE) {
         held_dir = fast_dir;
@@ -82,7 +91,14 @@ static void actions_update_direction (menu_t *menu) {
 }
 
 static void actions_update_buttons (menu_t *menu) {    
-    joypad_buttons_t pressed = joypad_get_buttons_pressed(JOYPAD_PORT_1);
+    joypad_buttons_t pressed;
+
+    JOYPAD_PORT_FOREACH (i) {
+        pressed = joypad_get_buttons_pressed(i);
+        if (pressed.raw) {
+            break;
+        }
+    }
 
     if (pressed.a) {
         menu->actions.enter = true;