pi-processes v0.6.0

67da7e3: Add /ps:dock, /ps:focus, /ps:logs commands. Add deprecated /process:* commands. Replace status widget with log dock. Preserve ANSI colors. Fix duplicate notifications. Use proper ThemeColor type.
8cd4247: Exclude local implementation plan documents from version control.
47bd895: Split widget hook into focused modules for types, status rendering, and setup.
905a499: Add write action to write to process stdin

The process tool now supports writing to a running process’s stdin:
- process action=write id=proc_1 input="hello\n" - write data to stdin
- process action=write id=proc_1 input="quit\n" end=true - write and close stdin
Useful for interactive programs, testing RPC mode, and any scenario requiring input to be sent to a background process.
265d8ff: Reorganize process commands into per-command directories and split settings command internals.

9fa2188: Restore bottom border line on log overlay
dbcd3d1: Split commands into separate files for better organization
d0814e6: Improve tool result display when collapsed: show last 2 output lines, first 3 processes with status. Remove redundant action/status footer on success.