2025-06-20 updates

[daler]

vim

• Replace vim-sleuth with indent-o-matic for better indentation detection
• Replace nvim-cmp with blink.cmp for autocompletion (about the same features but much simplified config)
• Replace nvim-tree with neo-tree for file browsing (more features plus better integration with nvim-aider)
• Add nvim-aider plugin
• Update checkbox rendering in markdown files
• zenfade colorscheme (not enabled by default)
• add treesj plugin

docs

• Overhaul vim docs
• Split off plugins into separate page and reorganize
• New .. plugin-metadata:: ReST directive to scrape git activity for plugins to add to a changelog for each plugin

setup

• conda installation dir can be configured via env var CONDA_INSTALLATION_DIR

[daler]

Closing in favor of #61. Ended up not using nvim-aider or neotree so those are excluded in #61; that PR has cleaner commits, too.