fix Greek dead key terminator (Ω→α), enable CapsLock language switch, fix parser key resolution

- change Greek dead key terminator from Ω to α in all layout versions,
  matching the official EurKEY spec (closes #11)
- change dead key state name from "dead: Ω" to "dead: α" in v1.2/v1.3
- enable TICapsLockLanguageSwitchCapable in build script (closes #8)
- fix parser to resolve all key codes from base keyMapSets, not just
  codes in explicit layout entry ranges
- add per-version exceptions for newly-discovered v1.2/v1.4 differences
- add Karabiner-Elements docs section, known issues section to README
- add Windows spec installers for reference
- regenerate all parsed JSON specs with fixed parser

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/validate_layouts.py

@@ -185,7 +185,12 @@ V1_2_EXCEPTIONS = {
 	# Shift+Option S: v1.2 has § where v1.3 has ẞ (capital sharp s)
 	"4:1": {"output": "§"},
 	# v1.2 does not have the ¬ (negation) dead key — added in v1.3
+	# instead, Option+- has the © dead key, and Option+\ outputs plain ¬
 	"_dead_key_skip": ["dead: ¬"],
+	"3:27": {"deadKey": "dead: ©"},   # Option+-: © dead key instead of ¬ dead key
+	"3:42": {"output": "¬"},          # Option+\: plain ¬ instead of ¬ dead key
+	"4:27": {"output": "№"},          # Shift+Option+-: № instead of ✗
+	"5:27": {"deadKey": "dead: ©"},   # Caps+Option+-: © dead key instead of ¬ dead key
 }
 
 # v1.4 differences from v1.3:
@@ -194,6 +199,7 @@ V1_2_EXCEPTIONS = {
 V1_4_EXCEPTIONS = {
 	"2:10": {"output": "ẞ"},   # Caps: §/` → ẞ (capital sharp s)
 	"5:10": {"output": "ẞ"},   # Caps+Option: §/` → ẞ
+	"5:27": {"output": ""},    # Caps+Option+-: no output (missing ¬ dead key in this layer)
 	"dead:dead: ¬:extra:¬": True,  # extra ¬ composition in negation dead key
 }