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>

Cargo.lock

@@ -376,11 +376,11 @@ checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
 [[package]]
 name = "nuwiki-core"
-version = "0.2.0"
+version = "0.3.0"
 
 [[package]]
 name = "nuwiki-ls"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "nuwiki-lsp",
  "tokio",
@@ -388,7 +388,7 @@ dependencies = [
 
 [[package]]
 name = "nuwiki-lsp"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "async-trait",
  "dashmap 6.1.0",