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

footprints/other/cui.pretty/CUI_PJ-102[AB]H.kicad_mod

@@ -0,0 +1,16 @@
+(module CUI_PJ-102[AB]H (layer F.Cu) (tedit 54528A9F)
+  (fp_text reference CUI_PJ-102[AB]H (at 0 0) (layer F.SilkS)
+    (effects (font (thickness 0.3048)))
+  )
+  (fp_text value VAL** (at 0 0) (layer F.SilkS)
+    (effects (font (thickness 0.3048)))
+  )
+  (fp_line (start -4.5  -10.7) (end 4.5  -10.7) (layer F.SilkS) (width 0.2032))
+  (fp_line (start 4.5  -10.7) (end 4.5  3.7) (layer F.SilkS) (width 0.2032))
+  (fp_line (start 4.5  3.7) (end -4.5  3.7) (layer F.SilkS) (width 0.2032))
+  (fp_line (start -4.5  3.7) (end -4.5  -10.7) (layer F.SilkS) (width 0.2032))
+  (pad 1 thru_hole circle (at 0 3) (size 3 3) (drill 1.5) (layers *.Cu *.Mask F.SilkS))
+  (pad 2 thru_hole circle (at 0 -3) (size 3 3) (drill 1.5) (layers *.Cu *.Mask F.SilkS))
+  (pad 3 thru_hole circle (at -4.7 0) (size 3 3) (drill 1.5) (layers *.Cu *.Mask F.SilkS))
+  (pad "" np_thru_hole circle (at 0 -7.5) (size 2.2 2.2) (drill 2.2) (layers *.Cu *.Mask F.SilkS))
+)