feat: initial fish shell configuration

- Core config layered on CachyOS base with Catppuccin Mocha theming
- Fisher plugins: fzf.fish, catppuccin, autopair, replay, puffer-fish, magic-enter, spark
- Smart CLI wrappers with fallbacks (bat, lsd, btop, dust, prettyping)
- Custom functions: git, docker, network, kitty, AI session management
- Extensive abbreviation system for keyboard-driven workflows
- Secrets/local sourcing pattern for private and machine-specific config
- README with full documentation and personalization guide
- AGPLv3+ license with copyright headers on all source files

functions/fish_right_prompt.fish

@@ -0,0 +1,22 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+function fish_right_prompt
+    # 1. Docker Context in Blue
+    set -l docker_ctx (docker context show 2>/dev/null)
+    if test -n "$docker_ctx"; and test "$docker_ctx" != default
+        set_color blue
+        echo -n "󰡨 $docker_ctx "
+        set_color normal
+    end
+
+    # 2. Timestamp Logic with Fallback
+    set_color brblack
+    if type -q __bobthefish_timestamp
+        __bobthefish_timestamp
+    else
+        # Manual fallback format: Wed Feb 11 15:04:28 2026
+        date "+%a %b %d %H:%M:%S %Y"
+    end
+    set_color normal
+end