Converted base schematic into electronic format

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "schematic/lib/usini_kicad_sensors"]
+	path = schematic/lib/usini_kicad_sensors
+	url = https://github.com/usini/usini_kicad_sensors.git

schematic/.gitignore

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+# For PCBs designed using KiCad: https://www.kicad.org/
+# Format documentation: https://kicad.org/help/file-formats/
+
+# Temporary files
+*.000
+*.bak
+*.bck
+*.kicad_pcb-bak
+*.kicad_sch-bak
+*-backups
+*.kicad_prl
+*.sch-bak
+*~
+_autosave-*
+*.tmp
+*-save.pro
+*-save.kicad_pcb
+fp-info-cache
+
+# Netlist files (exported from Eeschema)
+*.net
+
+# Autorouter files (exported from Pcbnew)
+*.dsn
+*.ses
+
+# Exported BOM files
+*.xml
+*.csv