Update README.md to include other exchanges supported + ladder in fea…

…tures (#67)

* Update README.md

* Add DOM (Depth of Market) feature description to README

* update trade fetch section for new exchanges

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Co-authored-by: akenshaw <[email protected]>

fix(heatmap): prevent overlapping bid/ask runs

-- with >100ms aggregations, there were some edge cases with side flips, where it was missing to end the previous run and resulting to an overly extended run that isnt completely accurate. The fix should also result smoother runs on these aggregations without having the need for "coalescing" filter on

update workflow to include necessary libs

chore: implement an icon to "indicator toggle" modals

feat!: moved persistent storage to user data dir.

-- /home/user/.local/share/flowsurface
-- 	/Users/user/Library/Application Support/flowsurface
-- 	C:\Users\user\AppData\Roaming\flowsurface

add depth bars showing current orderbook, +avoided unnecessary time c…

…onversions

used more enums instead of strings where possible

add experimental depth heatmaps