chore: Remove runtime artifacts from git tracking

This commit removes the following directories from git tracking (not from disk):
- .agent/ - AI tool configs
- .agents/ - Agent skills
- .augment/ - Augment AI
- .beads/ - Runtime database
- .claude/ - Claude AI configs
- .cline/ - Cline AI configs
- .openhands/ - OpenHands AI
- .dolt/ - Dolt database

These are now properly gitignored and will not appear in the repository.
This is a MASSIVE cleanup removing 1500+ files from version control.

.beads/hooks/prepare-commit-msg

@@ -1,24 +0,0 @@
-#!/usr/bin/env sh
-# bd-shim v1
-# bd-hooks-version: 0.48.0
-#
-# bd (beads) prepare-commit-msg hook - thin shim
-#
-# This shim delegates to 'bd hooks run prepare-commit-msg' which contains
-# the actual hook logic. This pattern ensures hook behavior is always
-# in sync with the installed bd version - no manual updates needed.
-#
-# Arguments:
-#   $1 = path to the commit message file
-#   $2 = source of commit message (message, template, merge, squash, commit)
-#   $3 = commit SHA-1 (if -c, -C, or --amend)
-
-# Check if bd is available
-if ! command -v bd >/dev/null 2>&1; then
-    echo "Warning: bd command not found in PATH, skipping prepare-commit-msg hook" >&2
-    echo "  Install bd: brew install beads" >&2
-    echo "  Or add bd to your PATH" >&2
-    exit 0
-fi
-
-exec bd hooks run prepare-commit-msg "$@"