Support for LspSaga (#48)

* lspsaga: update readme
add lspsaga to the readme

* feat: code actions and diagnostics hl-groups
Highlight groups for:
- code actions
- diagnostics

* feat(nvim): add some more colors

Adding some more lspsaga colors.

* feat(lspsaga): finishing touches

Add the finihing touches and add the last needed highlightgroups

Disclaimer: Preview Definitions still don't work

* style(lspsaga): remove comments and rearrange

Remove uneeded comments and rearrange some code

* fix(lspsaga): preview definitions

Preview Definitions now get highlighted! Why?
Because it's *Definitions* not *Defintions*

* feat(lspsaga): add one new highlight

Add LspSagaBorderTitle highlight

* fix(lspsaga): remove lspsaga.norg

* style(lspsaga): rearrange diagnostic highlights

Rearrange `DiagnosticInformation` and `DiagnosticWarning` to their respective spots

* Revert "Merge branch 'main' into main"

This reverts commit 5d26b3da8b, reversing
changes made to 12cfac46f3.

* lspsaga: update readme
add lspsaga to the readme

* feat: code actions and diagnostics hl-groups
Highlight groups for:
- code actions
- diagnostics

* style(lspsaga): remove comments and rearrange

Remove uneeded comments and rearrange some code

* style(lspsaga): rearrange diagnostic highlights

Rearrange `DiagnosticInformation` and `DiagnosticWarning` to their respective spots

* Revert "Merge branch 'main' into main"

This reverts commit 5d26b3da8b, reversing
changes made to 12cfac46f3.

* fix(lspsaga): add missing diagnostc groups

* style(lspsaga): format with stylua

* chore: format

Co-authored-by: mvllow <mvllow@icloud.com>

readme.md

@@ -38,6 +38,7 @@ use({
 - **[Indent-Blankline.nvim](https://github.com/lukas-reineke/indent-blankline.nvim)**
 - **[Neogit](https://github.com/TimUntersberger/neogit)**
 - **[Neorg](https://github.com/nvim-neorg/neorg)**
+- **[Lspsaga](https://github.com/tami5/lspsaga.nvim)**
 - **[Lualine](https://github.com/hoob3rt/lualine.nvim)**
   ```lua
   require('lualine').setup({