Consolidate doc/platform/ into doc/platforms/ (#63)

Merged the separate platform and platforms documentation directories
into a single doc/platforms/ folder. Moved hooks.md and learnings.md
files for both Claude and Gemini platforms, updated the README with
the new structure, and fixed references in architecture.md and
CHANGELOG.md.

Co-authored-by: Claude <noreply@anthropic.com>

Author: nhorton

CHANGELOG.md

@@ -12,7 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `wrapper.py`: Normalizes input/output between Claude Code and Gemini CLI
   - `claude_hook.sh` and `gemini_hook.sh`: Platform-specific shell wrappers
   - `policy_check.py`: Cross-platform policy evaluation hook
-- Platform documentation in `doc/platform/` and `doc/platforms/` with hook references and learnings
+- Platform documentation in `doc/platforms/` with hook references and learnings
 - Claude Code platform documentation (`doc/platforms/claude/`)
 - `update.job` for maintaining standard jobs (#41)
 - `make_new_job.sh` script and templates directory for job scaffolding (#37)

doc/architecture.md

@@ -1116,7 +1116,7 @@ def my_hook(input: HookInput) -> HookOutput:
 # Called via: claude_hook.sh mymodule or gemini_hook.sh mymodule
 ```
 
-See `doc/platform/` for detailed platform-specific hook documentation.
+See `doc/platforms/` for detailed platform-specific hook documentation.
 
 ### Policy Schema
 

doc/platform/README.md doc/platforms/README.mddoc/platform/README.md renamed to doc/platforms/README.md

@@ -24,14 +24,18 @@ When you discover something about how a platform behaves that isn't obvious from
 ## Directory Structure
 
 ```
-doc/platform/
-├── README.md           # This file
+doc/platforms/
+├── README.md               # This file
 ├── claude/
-│   ├── hooks.md        # Claude Code hooks system documentation
-│   └── learnings.md    # Discovered behaviors and quirks
+│   ├── cli_configuration.md  # Claude Code CLI configuration
+│   ├── hooks.md              # Claude Code hooks system (input/output schemas)
+│   ├── hooks_system.md       # Command-level hook support
+│   └── learnings.md          # Discovered behaviors and quirks
 └── gemini/
-    ├── hooks.md        # Gemini CLI hooks system documentation
-    └── learnings.md    # Discovered behaviors and quirks
+    ├── cli_configuration.md  # Gemini CLI configuration
+    ├── hooks.md              # Gemini CLI hooks system (input/output schemas)
+    ├── hooks_system.md       # Command-level hook limitations
+    └── learnings.md          # Discovered behaviors and quirks
 ```
 
 ## Platform Comparison Summary
@@ -51,4 +55,3 @@ doc/platform/
 
 - `src/deepwork/core/adapters.py` - Platform adapter implementations
 - `src/deepwork/hooks/` - Hook wrapper scripts
-- `doc/platforms/` - External platform documentation (configuration, commands)