User dir layout and naming

[goodboy]

Relating to finally starting to fill in and use a main conf.toml as per #221, I think it's worth discussing thee naming and org of (sub)dirs in the user directory managed for both data storage and config.

On linux this dir is normally located @ /home/<user>/.config/piker/

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latest layout and naming ideas:

• $HOME/.config/piker/

  • conf.toml

    • root config as in #221
    • eventually .data, .clearing and .ui controls
      • ADD ISSUE HERE

  • brokers.toml

    • private, containing live order ctl creds!
    • relates to backend specific config which can be somewhat vague: https://github.com/pikers/piker/issues?q=is%3Aissue+is%3Aopen+brokers+label%3Abroker-backend

  • fsp.toml

    • eventually points to other code and/or DSL stuff?

  • viewlists.toml

    • like watchlists but with meta-data for UI like overlay stuff?

  • _cache/

    • landing in #528 or something related
    • binance.symcache.toml
    • kraken.symcache.toml
    • ib.symcache.toml ...

  • _tsdb/

    • as per new stuff in #486
    • aapl.nasdaq.ib.ohlcv60s.parquet
    • btc.usdtm.perp.binance.ohlcv60s.parquet ...

  • accounts/

    • design plans / refinement in #515

    • ledgers/ I'm thinking we could maybe not have this subdir and instead just name ledger files as something like ledger.binance.spot.toml much like the below..?

    • account.binance.spot.toml ...