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)

docs/CONTRIBUTING.md

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+Before contributing to the KiCad symbol libraries, it is recommended to read the [contribution guidelines](http://kicad.org/libraries/contribute).
+
+Contributions to the KiCad libraries must meet the [KiCad Library Conventions (KLC)](http://kicad.org/libraries/klc/)

docs/README.md

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+# KiCad Symbols
+
+This repository contains the official KiCad schematic symbol libraries.
+
+**The libraries in this repository are intended for KiCad version 8.x**
+
+Each symbol library is stored as a `.kicad_sym` file.
+
+Contribution guidelines can be found at http://kicad.org/libraries/contribute
+The library convention can be found at http://kicad.org/libraries/klc/
+
+Other KiCad library repositories are located:
+
+* Footprints: https://gitlab.com/kicad/libraries/kicad-footprints
+* 3D Models: https://gitlab.com/kicad/libraries/kicad-packages3d
+* Templates: https://gitlab.com/kicad/libraries/kicad-templates

docs/README_2.md

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+# ESP32-S31-WROOM-3
+
+KiCad schematic symbol and footprint for the ESP32-S31-WROOM-3 module.
+
+Note: this chip isn't widely available yet, but the symbol and footprint are ready if you want to start designing boards around it.
+
+## Contents
+
+- `ESP32-S31-WROOM-3.kicad_sym` — schematic symbol
+- `footprint/ESP32-S31-WROOM-3.kicad_mod` — PCB footprint
+
+## Usage
+
+Add this repo as a library in KiCad (Preferences > Manage Symbol Libraries / Manage Footprint Libraries), pointing at the `.kicad_sym` file and the `footprint` folder.
+
+## Preview
+
+### Schematic symbol
+![Schematic](schematic.png)
+
+### Footprint
+![Footprint](footprint.png)

docs/how-to-import.htm

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+<!DOCTYPE HTML><html lang="en-US"> <head> <meta charset="UTF-8"> <meta http-equiv="refresh" content="0; url=https://www.snapeda.com/about/import/#"> <script type="text/javascript">window.location.href="https://www.snapeda.com/about/import/#" </script> <title>Page Redirection</title> </head> <body> If you are not redirected automatically, follow this <a href="https://www.snapeda.com/about/import/#">link to the import guide</a>. </body></html>