Implement support for workspace/symbol

[niilohlin]

solves #237 and #115 with inspiration from #511

[feakuru]

you beat me to this and i could never make this so beautiful :D thanks for doing this!

[ibrokemypie]

What needs to be done for this to be merged?

[eyalk5]

Hi, it didn't work for me.
The good thing is that doing git merge is really easy.
I am not going to invest a lot debugging it.
can you write the exact configuration? I saw that it is enabled by default.

[DEBUG][2025-04-06 03:55:40] ...m/lsp/client.lua:678	"LSP[pylsp]"	"client.request"	1	"workspace/symbol"	{  query = ""}	<function 1>	5
[DEBUG][2025-04-06 03:55:40] .../vim/lsp/rpc.lua:286	"rpc.send"	{  id = 2,  jsonrpc = "2.0",  method = "workspace/symbol",  params = {    query = ""  }}
[DEBUG][2025-04-06 03:55:40] ...m/lsp/client.lua:678	"LSP[pyright]"	"client.request"	2	"workspace/symbol"	{  query = ""}	<function 1>	5
[DEBUG][2025-04-06 03:55:40] .../vim/lsp/rpc.lua:286	"rpc.send"	{  id = 2,  jsonrpc = "2.0",  method = "workspace/symbol",  params = {    query = ""  }}
[DEBUG][2025-04-06 03:55:40] .../vim/lsp/rpc.lua:408	"rpc.receive"	{  id = 2,  jsonrpc = "2.0",  result = {}}
[DEBUG][2025-04-06 03:55:40] .../vim/lsp/rpc.lua:408	"rpc.receive"	{  id = 2,  jsonrpc = "2.0",  result = {}}
``