Add TICON-4 data

[bkeepers]

This pull request adds a script to import stations from TICON-4, TIdal CONstants based on GESLA-4 sea-level records.

It includes 4,838 global stations.

$ tools/import-ticon
Done. Created 4838 stations.

TODO:

• Resolve duplicates between NOAA/TICON. It might make sense to just skip any that are from NOAA in TICON, but I want to compare the list and see if there are any differences.
• Implement missing constituents in tide-predictor
  • MSQM
  • EP2
  • MTM
  • LAMBDA2
  • MKS2
  • N4
  • S3
  • MA2
  • MB2
  • T3
  • R3
  • RHO1
  • SGM
  • 3L2
  • 3N2
  • 2MS6
  • 2MK5
  • 2MO5

[Copilot]

Pull request overview

This pull request adds functionality to import 4,838 global tide stations from the TICON-4 (TIdal CONstants based on GESLA-4) dataset. The implementation includes a bash script to download the data, a TypeScript module to parse and convert the data to the repository's station JSON schema, and a new utility module for computing tidal datums.

Key changes:

• New import tooling for TICON-4 dataset with automatic data download and processing
• New datum computation utilities using synthetic tidal predictions
• Updated @neaps/tide-predictor dependency to version 0.3.0 to support additional harmonic constituents

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
tools/import-ticon	Bash script that downloads TICON-4 data and invokes the TypeScript import script
tools/import-ticon.ts	TypeScript module that parses TICON-4 CSV files and converts stations to JSON schema
tools/datum.ts	New utility module for computing tidal datums from harmonic constituents using synthetic predictions
package.json	Updates @neaps/tide-predictor dependency from 0.2.1 to 0.3.0
.gitignore	Adds tmp directory to exclude downloaded data from version control

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[bkeepers]

• Resolve duplicates between NOAA/TICON. It might make sense to just skip any that are from NOAA in TICON, but I want to compare the list and see if there are any differences.

I'm going to leave this for now. Later I can add a way to load data by source or filter out likely.