Migrate (and update) docs from 'docker-finance' repo to 'dfi-docs' repo

- Moves all documentation to this repository
- Updates markdown to reflect latest impl
- Updates assets to reflect latest impl
  * Assets are also now more self-documenting
  * Adds utility script to create gif examples

utils/make_gif_examples.bash

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+# docker-finance | modern accounting for the power-user
+#
+# Copyright (C) 2025 Aaron Fiore (Founder, Evergreen Crypto LLC)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+make_gif_examples()
+{
+  local -r _path="$(dirname "$(realpath -s $0)")/../assets/examples"
+  if [ ! -d "${_path}"/png ]; then
+    echo "FATAL: example path not found" >&2
+    return 1
+  fi
+
+  hash gawk || return $?
+  hash magick || return $?
+
+  ls "${_path}"/png \
+    | gawk '{print $(NF-1)}' FS='_' \
+    | sort -u \
+    | while read _file; do
+      magick "${_path}"/png/*"${_file}"* \
+        -gravity center \
+        -crop 2:1 \
+        +repage \
+        -resize 400x400 \
+        -set delay $((RANDOM % (350 - 250 + 1) + 250)) \
+        "${_path}"/gif/"${_file}".gif
+    done
+}
+
+make_gif_examples