Remove London Overground

[martincostello]

• Remove "London Overground" and replace with the new rebranded individual lines.
• Add "liz" and "lizzy" as synonyms for the Elizabeth Line.
• Lint the interaction model is valid JSON.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.47%. Comparing base (dee8e78) to head (eae67aa).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1514      +/-   ##
==========================================
- Coverage   93.56%   93.47%   -0.09%     
==========================================
  Files          49       49              
  Lines         606      598       -8     
  Branches       54       53       -1     
==========================================
- Hits          567      559       -8     
  Misses         23       23              
  Partials       16       16              

Flag	Coverage Δ
linux	93.47% <100.00%> (-0.09%)	⬇️
macos	93.47% <100.00%> (-0.09%)	⬇️
windows	93.47% <100.00%> (-0.09%)	⬇️

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[martincostello]

/deploy

[github-actions]

🧪 Tests for deployment to dev passed ✅

[github-actions]

Payload	Duration	Billed Duration	Memory Size	Max Memory Used	Init Duration	Trace
Launch	1344.636	1742	192	85	396.735	🔗
Disruption	1095.386	1096	192	96	-	🔗
Cancel	27.614	28	192	96	-	🔗
UnknownIntent	56.215	57	192	96	-	🔗
Stop	27.628	28	192	96	-	🔗
SessionEnded	61.566	62	192	96	-	🔗
Status	217.436	218	192	96	-	🔗
Help	27.189	28	192	97	-	🔗