Migrate caff and sort-in-place tools

[codeforester]

Summary

• Migrate caff and sort-in-place from codeforester/base into the Base Platform Tools CLI layout.
• Add public launchers under bin/ that delegate through Base's basectl.
• Add Bash command implementations, README files, and BATS tests under cli/bash/commands/.
• Declare caff and sort-in-place in base_manifest.yaml.
• Extend validation and GitHub Actions to cover the migrated command structure and BATS tests.

Issue

Closes #4

Validation

• tests/validate.sh
• bash -n bin/caff bin/sort-in-place cli/bash/commands/caff/caff.sh cli/bash/commands/sort-in-place/sort-in-place.sh tests/validate.sh
• bats cli/bash/commands/caff/tests/caff.bats cli/bash/commands/sort-in-place/tests/sort-in-place.bats
• git diff --check
• /Users/rameshhp/work/base/bin/basectl test base-platform-tools --workspace /Users/rameshhp/work/base-platform-tools-worktrees
• /Users/rameshhp/work/base/bin/basectl run base-platform-tools --workspace /Users/rameshhp/work/base-platform-tools-worktrees --list
• /Users/rameshhp/work/base/bin/basectl run base-platform-tools caff --workspace /Users/rameshhp/work/base-platform-tools-worktrees -- --help
• /Users/rameshhp/work/base/bin/basectl run base-platform-tools sort-in-place --workspace /Users/rameshhp/work/base-platform-tools-worktrees -- --help

basectl test and basectl run report the expected warning that the base-platform-tools project venv has not been created yet because basectl setup base-platform-tools has not been run, then execute successfully.

Platform Support

• caff is macOS-specific because it depends on the macOS caffeinate command.
• sort-in-place uses Bash and sort; it should work on macOS, Linux, and WSL where standard POSIX tools are available.
• CI runs the BATS suite on Ubuntu with command stubs for macOS-specific caff behavior.

Notes

• This PR copies/migrates the utilities into base-platform-tools.
• A follow-up PR in codeforester/base will remove the old copies from Base after this PR is merged.