init: initial library structure

README.md

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+# AidanBrzezinski KiCad Library
+
+Personal KiCad component library for use across all projects.
+Used as a git submodule in project repos.
+
+## Structure
+- symbols/     — KiCad symbol libraries (.kicad_sym)
+- footprints/  — KiCad footprint libraries (.pretty folders)
+- 3d_models/   — STEP and WRL 3D models (flat)
+
+## Usage in a project
+```bash
+git submodule add https://github.com/AidanBrzezinski/KiCad_Library lib/shared
+```
+
+Then in KiCad, add sym-lib-table and fp-lib-table entries pointing to
+${KIPRJMOD}/lib/shared/symbols/ and ${KIPRJMOD}/lib/shared/footprints/
+
+## Conventions
+- All symbols copied from KiCad global library retain original drawing
+- Fields added: MPN, Digikey_PN, Manufacturer, Datasheet (local path)
+- All footprints verified against physical datasheet dimensions
+- 3D models stored flat in 3d_models/ referenced via ${KIPRJMOD}