feature: interface for adding breakpoint conditions

[shmerl]

Currently to add a conditional breakpoint, you'd have to explicitly use nvim-dap's API on a given line, for example:

:lua require('dap').set_breakpoint('foo == 15')

While nvim-dap-ui shows the condition of the breakpoint in its DAP Breakpoints element (window), it doesn't allow modifying it or adding new one from there.

It would be a nice feature to be able to set or edit that condition from the breakpoints window.

[sleeptightAnsiC]

This part of API will be changed in the nvim-dap upstream soon
mfussenegger/nvim-dap#1388
Might be worth to wait till said change is done.
Perhaps, nvim-dap will add UI functionality for this.

[sleeptightAnsiC]

The problem with implementing this is that dap.toggle_breakpoint() creates breakpoints "at the current line" in buffer taken from api.nvim_get_current_buf() . One cannot easily query it to set BP at specific line in file or function (not sure how well debuggers support the latter option). The workaround is probably possible by re-implementing this functionality on nvim-dap-ui side but it would be very ugly.