schematic: Update to KiCad 9 and some minor fixes

- Add gain setting resistor for I2S Amp
- Add three pushbuttons

hardware/tonberry-pico/tonberry-pico.kicad_prl

@@ -10,6 +10,7 @@
     "opacity": {
       "images": 0.6,
       "pads": 1.0,
+      "shapes": 1.0,
       "tracks": 1.0,
       "vias": 1.0,
       "zones": 0.6
@@ -28,43 +29,27 @@
       "zones": true
     },
     "visible_items": [
-      0,
-      1,
-      2,
-      3,
-      4,
-      5,
-      8,
-      9,
-      10,
-      11,
-      12,
-      13,
-      15,
-      16,
-      17,
-      18,
-      19,
-      20,
-      21,
-      22,
-      23,
-      24,
-      25,
-      26,
-      27,
-      28,
-      29,
-      30,
-      32,
-      33,
-      34,
-      35,
-      36,
-      39,
-      40
+      "vias",
+      "footprint_text",
+      "footprint_anchors",
+      "ratsnest",
+      "grid",
+      "footprints_front",
+      "footprints_back",
+      "footprint_values",
+      "footprint_references",
+      "tracks",
+      "drc_errors",
+      "drawing_sheet",
+      "bitmaps",
+      "pads",
+      "zones",
+      "drc_warnings",
+      "locked_item_shadows",
+      "conflict_shadows",
+      "shapes"
     ],
-    "visible_layers": "fffffff_ffffffff",
+    "visible_layers": "00000000_00000000_0fffffff_ffffffff",
     "zone_display_mode": 0
   },
   "git": {
@@ -75,9 +60,39 @@
   },
   "meta": {
     "filename": "tonberry-pico.kicad_prl",
-    "version": 3
+    "version": 5
   },
+  "net_inspector_panel": {
+    "col_hidden": [],
+    "col_order": [],
+    "col_widths": [],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": -1
+  },
+  "open_jobsets": [],
   "project": {
     "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
   }
 }

hardware/tonberry-pico/tonberry-pico.kicad_pro

@@ -16,6 +16,7 @@
       "mfg": "",
       "mpn": ""
     },
+    "layer_pairs": [],
     "layer_presets": [],
     "viewports": []
   },
@@ -210,10 +211,15 @@
       "duplicate_sheet_names": "error",
       "endpoint_off_grid": "warning",
       "extra_units": "error",
+      "footprint_filter": "ignore",
+      "footprint_link_issues": "warning",
+      "four_way_junction": "ignore",
       "global_label_dangling": "warning",
       "hier_label_mismatch": "error",
       "label_dangling": "error",
+      "label_multiple_wires": "warning",
       "lib_symbol_issues": "warning",
+      "lib_symbol_mismatch": "warning",
       "missing_bidi_pin": "warning",
       "missing_input_pin": "warning",
       "missing_power_pin": "error",
@@ -226,9 +232,14 @@
       "pin_not_driven": "error",
       "pin_to_pin": "warning",
       "power_pin_not_driven": "error",
+      "same_local_global_label": "warning",
+      "similar_label_and_power": "warning",
       "similar_labels": "warning",
+      "similar_power": "warning",
       "simulation_model_issue": "ignore",
+      "single_global_label": "ignore",
       "unannotated": "error",
+      "unconnected_wire_endpoint": "warning",
       "unit_value_mismatch": "error",
       "unresolved_variable": "error",
       "wire_dangling": "error"
@@ -240,7 +251,7 @@
   },
   "meta": {
     "filename": "tonberry-pico.kicad_pro",
-    "version": 1
+    "version": 3
   },
   "net_settings": {
     "classes": [
@@ -255,6 +266,7 @@
         "microvia_drill": 0.1,
         "name": "Default",
         "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": 2147483647,
         "schematic_color": "rgba(0, 0, 0, 0.000)",
         "track_width": 0.2,
         "via_diameter": 0.6,
@@ -263,7 +275,7 @@
       }
     ],
     "meta": {
-      "version": 3
+      "version": 4
     },
     "net_colors": null,
     "netclass_assignments": null,
@@ -285,6 +297,7 @@
   },
   "schematic": {
     "annotate_start_num": 0,
+    "bom_export_filename": "${PROJECTNAME}.csv",
     "bom_fmt_presets": [],
     "bom_fmt_settings": {
       "field_delimiter": ",",
@@ -338,6 +351,7 @@
       ],
       "filter_string": "",
       "group_symbols": true,
+      "include_excluded_from_bom": false,
       "name": "Grouped By Value",
       "sort_asc": true,
       "sort_field": "Reference"
@@ -372,6 +386,7 @@
     "net_format_name": "",
     "page_layout_descr_file": "",
     "plot_directory": "",
+    "space_save_all_events": true,
     "spice_current_sheet_as_root": false,
     "spice_external_command": "spice \"%I\"",
     "spice_model_current_sheet_as_root": true,