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/fzf_configure_bindings.fish

@@ -0,0 +1,49 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Always installs bindings for insert and default mode for simplicity and b/c it has almost no side-effect
+# https://gitter.im/fish-shell/fish-shell?at=60a55915ee77a74d685fa6b1
+function fzf_configure_bindings --description "Installs the default key bindings for fzf.fish with user overrides passed as options."
+    # no need to install bindings if not in interactive mode or running tests
+    status is-interactive || test "$CI" = true; or return
+
+    set -f options_spec h/help 'directory=?' 'git_log=?' 'git_status=?' 'history=?' 'processes=?' 'variables=?'
+    argparse --max-args=0 --ignore-unknown $options_spec -- $argv 2>/dev/null
+    if test $status -ne 0
+        echo "Invalid option or a positional argument was provided." >&2
+        _fzf_configure_bindings_help
+        return 22
+    else if set --query _flag_help
+        _fzf_configure_bindings_help
+        return
+    else
+        # Initialize with default key sequences and then override or disable them based on flags
+        # index 1 = directory, 2 = git_log, 3 = git_status, 4 = history, 5 = processes, 6 = variables
+        set -f key_sequences ctrl-alt-f ctrl-alt-l ctrl-alt-s ctrl-r ctrl-alt-p ctrl-v
+        set --query _flag_directory && set key_sequences[1] "$_flag_directory"
+        set --query _flag_git_log && set key_sequences[2] "$_flag_git_log"
+        set --query _flag_git_status && set key_sequences[3] "$_flag_git_status"
+        set --query _flag_history && set key_sequences[4] "$_flag_history"
+        set --query _flag_processes && set key_sequences[5] "$_flag_processes"
+        set --query _flag_variables && set key_sequences[6] "$_flag_variables"
+
+        # If fzf bindings already exists, uninstall it first for a clean slate
+        if functions --query _fzf_uninstall_bindings
+            _fzf_uninstall_bindings
+        end
+
+        for mode in default insert
+            test -n $key_sequences[1] && bind --mode $mode $key_sequences[1] _fzf_search_directory
+            test -n $key_sequences[2] && bind --mode $mode $key_sequences[2] _fzf_search_git_log
+            test -n $key_sequences[3] && bind --mode $mode $key_sequences[3] _fzf_search_git_status
+            test -n $key_sequences[4] && bind --mode $mode $key_sequences[4] _fzf_search_history
+            test -n $key_sequences[5] && bind --mode $mode $key_sequences[5] _fzf_search_processes
+            test -n $key_sequences[6] && bind --mode $mode $key_sequences[6] "$_fzf_search_vars_command"
+        end
+
+        function _fzf_uninstall_bindings --inherit-variable key_sequences
+            bind --erase -- $key_sequences
+            bind --erase --mode insert -- $key_sequences
+        end
+    end
+end