chore(release): 0.3.0

Bump workspace + internal dep pins + g:nuwiki_version to 0.3.0.

Since 0.2.0:
- feat(config): read g:vimwiki_list on Neovim too (lazy.nvim drop-in)
- feat(config): bridge setup({wikis}) to g:nuwiki_wikis for VimL plugins
- feat(calendar): diary into the current wiki, not always the first
- fix(lsp): resolve links from anywhere in the link, including the title
- fix(install): resolve release asset via Gitea API / direct URL; guard
  download_bin.vim against 'compatible' mode

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plugin/nuwiki.vim

@@ -15,7 +15,7 @@ let g:loaded_nuwiki = 1
 " Plugin version, surfaced by :VimwikiShowVersion / :NuwikiShowVersion.
 " Set before the Neovim early-return below so both clients see the global.
 if !exists('g:nuwiki_version')
-  let g:nuwiki_version = '0.2.0'
+  let g:nuwiki_version = '0.3.0'
 endif
 
 " Resolve the plugin root NOW, while this script is being sourced and