Currently able to open any already created board or create a new board. Swapping out boards gives errors for now. Also
issues rerendering the board, need to figure out why the file watcher doesn't work.

Now it's possible to open any board created within a workspace, though only one board can be open at a time.

Instead of all classes being static we now instantiate them for each board.

Set up ESLint to have a more consistent coding style, and fixed the majority of issues with the code.

Also updated all the dependencies to the newest version. Removed git-user-name in the process, because it was using the
path library, whereas this is explicitly excluded from react 5. Did not see the need to have have git-user-name be the
default for an assignee.

I added a couple explicit String casts around paramCase for now as there are no typescript bindings for them at the
moment.

Also left a couple of TODOs for when typescript bindings for paramCase get updated.

Was checking for undefined in several places even though I should have been checking for empty string.

Allow multiple boards

Move the ownership of task panels to the corresponding KanbnBoardPanel.

There were a couple bugs associated with retainContextWhenHidden:
* Sometimes ctrl+w can close 2 webviews instead of one. I filed a bug report for this:
* Ctrl+tab / Ctrl+shift+tab would not work consistently, iterating over the tabs in unpredictable order.

These 2 issues have now been fixed. There is a brief bit of lag when switching between views but it is bearable for now.
Will need to investigate possible performance improvements in the future.

Clean up KanbnTaskPanel

Also support legacy boards that are created in the current workspace directory instead of the .kanbn_boards subdirectory.

Multiple setState calls were causing react to rerender much more than it needed to. Encapsulating the state into a
single state object fixes this by only making one setState call per update.

Adding per-workspace and per-user lists of boards to be accessible when we want to open a board.

Rename kanbn.board to kanbn.openBoard in KanbnStatusBarItem.ts.

* Fixed a few of issues with mapping between the extension server and task editor panel that disallowed saving a task that had tags, subtasks or custom fields.
* Fixed a name validation issue that didn't allow saving tasks unless the task name had changed.
* Fixed rendering of dates in the task editor.
* Fixed small rendering issues of custom fields in the board panel, like boolean or integer custom field values showing up even when
  they were not present in the task.

Task editor fixes

Now board.css gets loaded in all 3 types of panels, whereas previously it wasn't being loaded in any of them.

Fix loading of board.css styles in all panels

Show task counters at the top of a column.

There was an issue saving tasks with a progress value, now tasks should save properly and keep their values.

Fix saving tasks with progress value

Bump extension version.

Adds command to open task

Realised that my laptop no longer correctly applies the config, this seems to fix it.

Before I was incorrectly checking whether there are any workspaces open to see if any boards are present. Now the check
is whether we have detected at least one board.

Small fixes and cleanup

Fix button style when user is in light theme

Init panel title equally for new task and reopened task