Add support for runbook parameterization

[joshi4]

• server/run: Update default run socket name
• server/run: maintain state for set/unset params
• slice: support filtering
• Add support for setting params
• move extractParam to its own pkg
• server/run: Add CommandWithSetParams
• server/run: replace params with their values
• param: dedupe multiple instances of a single param
• stop using st.Command
• set-param: fix title
• set-param: use dracula
• shell/zsh: add newline after run setup msg
• set-param: add command title to share context of the parameter
• bash: add support for setting parameters
• cmd/set-param: fix spelling