feat: Programmatic implementation of /gsd:set-profile command (#1007)

* perf: make `/gsd:set-profile`'s implementation more programmatic

* perf: run the set-profile script without Claude needing to invoke it

- inject the script's output as dynamic context into the set-profile skill, so that Claude doesn't
  need to invoke it and can simply read + print the output to the user
  - reference: https://code.claude.com/docs/en/skills#inject-dynamic-context

* feat: improve output message for case where model profile wasn't changed

* feat: specify haiku model for set-profile command since it's so simple

* fix: remove ' (default)' from previousProfile to avoid false negative for didChange

* chore: add docstring to MODEL_PROFILES with note about the analogous markdown reference table

* chore: delete set-profile workflow file that's no longer needed

commands/gsd/set-profile.md

@@ -1,34 +1,12 @@
 ---
 name: gsd:set-profile
 description: Switch model profile for GSD agents (quality/balanced/budget/inherit)
-argument-hint: <profile>
+argument-hint: <profile (quality|balanced|budget|inherit)>
+model: haiku
 allowed-tools:
-  - Read
-  - Write
   - Bash
 ---
 
-<objective>
-Switch the model profile used by GSD agents. Controls which Claude model each agent uses, balancing quality vs token spend.
+Show the following output to the user verbatim, with no extra commentary:
 
-Routes to the set-profile workflow which handles:
-- Argument validation (quality/balanced/budget/inherit)
-- Config file creation if missing
-- Profile update in config.json
-- Confirmation with model table display
-</objective>
-
-<execution_context>
-@~/.claude/get-shit-done/workflows/set-profile.md
-</execution_context>
-
-<process>
-**Follow the set-profile workflow** from `@~/.claude/get-shit-done/workflows/set-profile.md`.
-
-The workflow handles all logic including:
-1. Profile argument validation
-2. Config file ensuring
-3. Config reading and updating
-4. Model table generation from MODEL_PROFILES
-5. Confirmation display
-</process>
+!`node "$HOME/.claude/get-shit-done/bin/gsd-tools.cjs" config-set-model-profile $ARGUMENTS --raw`