refactor: trim configuration and drop unused plugins

- Merge sunbather dark/light into one background-aware color scheme
- Fold uninstall.sh into install.sh as a subcommand; drop clone logic
- Inline bash_tools/ helpers; remove fct and odict
- Remove TPM, tmux-sensible, and tmux-fuzzback; tmux has no plugins now
- Remove vim-repeat, vim-fugitive, vim-gitgutter, vim-tmux-navigator,
  and moonfly; everforest is the default dark theme
- Fetch vim-plug via git instead of curl; require git, not curl
- Guard termguicolors on Windows consoles without VT support and set
  nomore before the vimrc loads so headless installs cannot hang
- Fall back to sunbather when a color scheme fails to load, without
  overwriting the saved preference
- Append config/vim to runtimepath so netrw stops writing into the repo
- Fix .editorconfig Python indent; trim .gitignore; update CI and README

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NBfsAH6iJg9inkNLKq11YC

README.md

@@ -7,7 +7,6 @@ Windows installer manages the same Vim configuration.
 
 - Git
 - Vim 9 or newer
-- `curl` for the Unix installer
 - Optional: tmux, zoxide, ripgrep, and a Nerd Font
 
 ## Install
@@ -15,7 +14,7 @@ Windows installer manages the same Vim configuration.
 Clone the repository, then install all components:
 
 ```bash
-git clone https://github.com/Donaldttt/dotfiles.git ~/.dotfiles
+git clone https://git.justconn.top/gitea-admin/dotfiles.git ~/.dotfiles
 ~/.dotfiles/install.sh
 ```
 
@@ -27,9 +26,8 @@ Components can be installed independently and combined:
 ```
 
 The installer backs up conflicting files, creates managed links, and installs
-Vim plugins and TPM. It never updates an existing repository automatically and
-does not install zoxide; if zoxide is already available, the managed Bash block
-initializes it.
+Vim plugins. It does not install zoxide; if zoxide is already available, the
+managed Bash block initializes it.
 
 On Windows, clone the repository and run:
 
@@ -39,8 +37,8 @@ python .\win-install.py
 
 ## Vim
 
-The Vim setup includes Fuzzbox and NERDTree navigation, Fugitive and GitGutter,
-Startify, a compact global statusline, and five color schemes.
+The Vim setup includes Fuzzbox and NERDTree navigation, Startify, a compact
+global statusline, and three color schemes.
 
 Useful mappings use `,` as the leader key:
 
@@ -70,8 +68,8 @@ git -C ~/.dotfiles pull --ff-only
 To remove managed links and the managed Bash block:
 
 ```bash
-~/.dotfiles/uninstall.sh
+~/.dotfiles/install.sh uninstall
 ```
 
-Uninstalling intentionally retains the repository, backups, Vim data/plugins,
-and TPM so user data is never removed implicitly.
+Uninstalling intentionally retains the repository, backups, and Vim
+data/plugins so user data is never removed implicitly.