feat: add Odin lang icon

[shizeeg]

added a filetype icon for https://odin-lang.org/

[hasecilu]

There is a glyph that can be used, I think it similar enough, the advantage is that it's bigger than the letter (the glyphs on my font I use double space).

Remember to run make.

[shizeeg]

I took the glyph from the starship.rs config it looks the same size as the other glyphs in the filetype table, plus it's possible to change the icon via .set_icon() via init.lua anyway.

[hasecilu]

Probably your font don't use double-wide Nerd Font glyphs but the people that use it may want to have the glyphs bigger, specially when using small font size.

[shizeeg]

should I change it and open another PR?

[hasecilu]

In this PR, I used nf-md-null glyph. You can send the new commits here and I'll squash them.

[alex-courtis]

Many thanks for fixing this one

[hasecilu]

Also run make

[shizeeg]

Also run make

I did. It failed somewhere in LSP since I'm not a Lua dev I have no idea what's wrong.

nvim \
	--clean \
	--headless \
	--cmd "set rtp^=vim-colortemplate" \
	-c 'source scripts/generate_colors.lua' \
	-c 'qall'
Error detected while processing command line..script /home/shizeeg/proj/nvim-web-devicons/scripts/generate_colors.lua:
E5113: Error while calling lua chunk: vim/_editor.lua:0: command line..script /home/shizeeg/proj/nvim-web-devicons/scripts/generate_colors.lua..nvim_exec2() called at /home/shizeeg/proj/nvim-web-devicons/scripts/generate_colors.lua:0..BufReadPost Autocommands for "*": Vim(append):Error executing lua callback: /usr/share/nvim/runtime/filetype.lua:36: command line..script /home/shizeeg/proj/nvim-web-devicons/scripts/generate_colors.lua..nvim_exec2() called at /home/shizeeg/proj/nvim-web-devicons/scripts/generate_colors.lua:0..BufReadPost Autocommands for "*"..FileType Autocommands for "*"..function <SNR>1_LoadFTPlugin[20]..script /usr/share/nvim/runtime/ftplugin/lua.lua: Vim(runtime):E5113: Error while calling lua chunk: /usr/share/nvim/runtime/lua/vim/treesitter.lua:415: Parser could not be created for buffer 1 and language "lua"
stack traceback:
	[C]: in function 'assert'
	/usr/share/nvim/runtime/lua/vim/treesitter.lua:415: in function 'start'
	/usr/share/nvim/runtime/ftplugin/lua.lua:2: in main chunk
	[C]: in function 'nvim_cmd'
	/usr/share/nvim/runtime/filetype.lua:36: in function </usr/share/nvim/runtime/filetype.lua:35>
	[C]: in function 'pcall'
	vim/shared.lua: in function <vim/shared.lua:0>
	[C]: in function '_with'
	/usr/share/nvim/runtime/filetype.lua:35: in function </usr/share/nvim/runtime/filetype.lua:10>
	[C]: in function 'nvim_exec2'
	vim/_editor.lua: in function 'cmd'
	...izeeg/proj/nvim-web-devicons/scripts/generate_colors.lua:125: in main chunk
stack traceback:
	[C]: in function '_with'
	/usr/share/nvim/runtime/filetype.lua:35: in function </usr/share/nvim/runtime/filetype.lua:10>
	[C]: in function 'nvim_exec2'
	vim/_editor.lua: in function 'cmd'
	...izeeg/proj/nvim-web-devicons/scripts/generate_colors.lua:125: in main chunk
stack traceback:
	[C]: in function 'nvim_exec2'
	vim/_editor.lua: in function 'cmd'
	...izeeg/proj/nvim-web-devicons/scripts/generate_colors.lua:125: in main chunkstylua . --check
luacheck lua scripts
Checking lua/nvim-web-devicons.lua                �[0m�[32m�[1mOK�[0m
Checking lua/nvim-web-devicons/hi-test.lua        �[0m�[32m�[1mOK�[0m
Checking lua/nvim-web-devicons/icons-default.lua  �[0m�[32m�[1mOK�[0m
Checking lua/nvim-web-devicons/icons-light.lua    �[0m�[32m�[1mOK�[0m
Checking scripts/generate_colors.lua              �[0m�[32m�[1mOK�[0m

Total: �[0m�[0m�[1m0�[0m warnings / �[0m�[0m�[1m0�[0m errors in 5 files

[alex-courtis]

CI https://github.com/nvim-tree/nvim-web-devicons/actions/runs/12306835846/job/34350949867?pr=521 shows a mismatch for the light icon colours.

Please generate them and commit as per https://github.com/nvim-tree/nvim-web-devicons/blob/master/CONTRIBUTING.md#generate-colors

[hasecilu]

Not sure why you have errors, anyway I couldn't force push to this PR maybe because this PR was made from your main branch? and since I can not push directly to main branch I made #524. Thanks for the contribution.