Add automated dotfiles deployment scripts

[Copilot]

Manual copying and syncing of dotfiles between repository and machines is time-consuming and error-prone.

Changes

deploy.sh - Symlinks repository dotfiles to $HOME:

• Backs up existing files with timestamps (file.backup.YYYYMMDD_HHMMSS)
• Idempotent operations (safe to re-run)
• Dry-run mode (--dry-run)
• Handles .profile, .zshrc, .vim/, and .config/*/ subdirectories

uninstall.sh - Removes deployed symlinks:

• Only removes symlinks pointing to this repository
• Optional backup restoration (--restore)
• Cross-platform stat detection (GNU/BSD)
• Dry-run mode (--dry-run)

README.md - Added installation and usage documentation

Example Usage

# Deploy dotfiles
./deploy.sh

# Preview changes first
./deploy.sh --dry-run

# Remove symlinks and restore originals
./uninstall.sh --restore

Both scripts pass shellcheck validation and handle edge cases (existing files, broken symlinks, permission errors).

Original prompt

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This section details on the original issue you should resolve

<issue_title>Implement automated dotfiles deployment</issue_title>
<issue_description>I spend a lot of time copying files from the repository to my machines and synching $HOME with the repo again. Ideally, I should just use a simple script for such job.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Implement automated dotfiles deployment #16

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