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/spark.fish

@@ -0,0 +1,36 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+function spark --description Sparklines
+    argparse --ignore-unknown --name=spark v/version h/help m/min= M/max= -- $argv || return
+
+    if set --query _flag_version[1]
+        echo "spark, version 1.1.0"
+    else if set --query _flag_help[1]
+        echo "Usage: spark <numbers ...>"
+        echo "       stdin | spark"
+        echo "Options:"
+        echo "       --min=<number>   Minimum range"
+        echo "       --max=<number>   Maximum range"
+        echo "       -v or --version  Print version"
+        echo "       -h or --help     Print this help message"
+        echo "Examples:"
+        echo "       spark 1 1 2 5 14 42"
+        echo "       seq 64 | sort --random-sort | spark"
+    else if set --query argv[1]
+        printf "%s\n" $argv | spark --min="$_flag_min" --max="$_flag_max"
+    else
+        command awk -v min="$_flag_min" -v max="$_flag_max" '
+            {
+                m = min == "" ? m == "" ? $0 : m > $0 ? $0 : m : min
+                M = max == "" ? M == "" ? $0 : M < $0 ? $0 : M : max
+                nums[NR] = $0
+            }
+            END {
+                n = split("▁ ▂ ▃ ▄ ▅ ▆ ▇ █", sparks, " ") - 1
+                while (++i <= NR) 
+                    printf("%s", sparks[(M == m) ? 3 : sprintf("%.f", (1 + (nums[i] - m) * n / (M - m)))])
+            }
+        ' && echo
+    end
+end