Initial commit: MIKILAB KiCad personal library

Self-contained KiCad library (symbols, footprints, 3D models, docs,
import/check tooling) with no dependency on kicad-personal-library.

- Fixed sym-lib-table/fp-lib-table: single (version 7) header, one entry
  per library, MIKILAB_<name> nicknames, ${KIPRJMOD}-relative URIs
- Resolved the SOT95P280X145-5N footprint collision (TPS7A2012PDBVR vs
  TPS7A2018PDBVR): confirmed byte-identical modulo KiCad's internal
  tedit timestamp, unified into one shared footprint
- Resolved a case-insensitive filename collision between the official
  Diode.kicad_sym and a custom diode.kicad_sym
- Wrapped standalone footprints (ESP32-S31-WROOM-3, IC_TPS63020DSJT,
  SOT95P280X145-5N) into their own .pretty libraries so they're
  actually registered in fp-lib-table
- Fixed broken symbol->footprint references (including one pointing at
  a nonexistent easyeda2kicad library)
- Added scripts/check_library.py, import_component.py, add_component.py,
  import_batch.py, and lib_common.py

docs/CMakeLists.txt

@@ -0,0 +1,53 @@
+cmake_minimum_required( VERSION 3.10 FATAL_ERROR )
+
+project( kicad-symbols NONE )
+
+#================================================
+# Locations for install targets.
+#================================================
+if( APPLE )
+    # Like all variables, CMAKE_INSTALL_PREFIX can be over-ridden on the command line.
+    set( CMAKE_INSTALL_PREFIX "/Library/Application Support/kicad/" CACHE PATH "" )
+
+    # Everything without leading / is relative to CMAKE_INSTALL_PREFIX.
+    set( KICAD_LIBRARY symbols )
+    set( KICAD_TEMPLATE template )
+else()
+    # Everything without leading / is relative to CMAKE_INSTALL_PREFIX.
+    set( KICAD_DATA share/kicad
+         CACHE PATH "Location of KiCad data files." )
+    set( KICAD_LIBRARY ${KICAD_DATA}/symbols )
+    set( KICAD_TEMPLATE ${KICAD_DATA}/template )
+endif()
+
+mark_as_advanced( KICAD_DATA KICAD_LIBRARY )
+
+
+#================================================
+# "make uninstall" rules
+#================================================
+configure_file(
+    "${PROJECT_SOURCE_DIR}/CMakeModules/cmake_uninstall.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+    IMMEDIATE @ONLY )
+
+add_custom_target( uninstall
+    "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake" )
+
+
+#================================================
+# Installed files.
+#================================================
+
+# Install all of the symbol library (.kicad_sym) and simulation model (.sp)
+# files in this folder.
+file(GLOB sym_and_sim_lib_files "*.kicad_sym" "*.sp")
+
+install(FILES ${sym_and_sim_lib_files}
+        DESTINATION ${KICAD_LIBRARY}
+        COMPONENT resources)
+
+# Install the default global symbol library table in the template folder.
+install(FILES sym-lib-table
+        DESTINATION ${KICAD_TEMPLATE}
+        COMPONENT resources)