Integrate old-svovel config: paths, aliases, completions

Add ~/bin PATH, rbenv (disabled), debuginfod, sccache, LESS/ag/task
aliases, and cargo/rustup completions. Removes old-svovel/ directory.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

10-bin-path

@@ -0,0 +1,3 @@
+# shellcheck shell=bash
+# Add ~/bin to PATH for personal scripts and tools
+path_prepend "$HOME/bin"

10-rbenv-path

@@ -0,0 +1,7 @@
+# shellcheck shell=bash
+# Set up rbenv (Ruby version manager)
+# Disabled by default (chmod +x to enable)
+path_prepend "$HOME/.rbenv/bin"
+if command -v rbenv &>/dev/null; then
+    eval "$(rbenv init - bash)"
+fi

20-debuginfod

@@ -0,0 +1,7 @@
+# shellcheck shell=bash
+# Configure debuginfod for automatic debug symbol downloads
+# shellcheck disable=SC2254
+if compgen -G '/usr/lib/*/libdebuginfod.so*' &>/dev/null; then
+    export DEBUGINFOD_URLS="https://debuginfod.debian.net/ https://debuginfod.fedoraproject.org/"
+    export DEBUGINFOD_PROGRESS=1
+fi

20-sccache

@@ -0,0 +1,5 @@
+# shellcheck shell=bash
+# Configure sccache (shared compilation cache)
+if command -v sccache &>/dev/null; then
+    export SCCACHE_CACHE_SIZE="40G"
+fi

30-aliases

@@ -0,0 +1,13 @@
+# shellcheck shell=bash
+# Miscellaneous aliases and settings
+
+export LESS=-R
+
+if command -v ag &>/dev/null; then
+    alias ag='ag --pager=less -A3 -B3 -C2'
+fi
+
+# Show task list on interactive shell startup
+if [[ $- == *i* ]] && command -v task &>/dev/null; then
+    task
+fi

50-cargo-completion

@@ -0,0 +1,10 @@
+# shellcheck shell=bash
+# Enable bash completion for cargo (Rust package manager)
+if command -v rustc &>/dev/null; then
+    _cargo_comp="$(rustc --print sysroot)/etc/bash_completion.d/cargo"
+    if [[ -f "$_cargo_comp" ]]; then
+        # shellcheck source=/dev/null
+        . "$_cargo_comp"
+    fi
+    unset _cargo_comp
+fi

50-rustup-completion

@@ -0,0 +1,3 @@
+# shellcheck shell=bash
+# Enable bash completion for rustup (Rust toolchain manager)
+cached_completion rustup rustup completions bash