fix(LspProgress): retrieve data directly from 'LspProgress' event

[linrongbin16]

In previous implementation: #137 , I used to poll the LSP status data from lsp clients, I learned it the Neovim's documents:

1. lsp - LspProgress
2. lsp - vim.lsp.Client.Progress

They should be officially supported, but I found it's difficult to understand the vim.lsp.Client.Progress data structure, the doc says it's extended from the RingBuf, so I simply used the pop API from the ringbuf, but my eyes feel like something are missing.

So this PR will directly retrieve the data from the LspProgress event data, it looks much better actually.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 72.99%. Comparing base (07ca8ea) to head (2f9400e).

Files	Patch %	Lines
lua/lsp-progress.lua	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #144      +/-   ##
==========================================
+ Coverage   72.50%   72.99%   +0.48%     
==========================================
  Files           7        7              
  Lines         451      448       -3     
==========================================
  Hits          327      327              
+ Misses        124      121       -3     

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