docs: add README for every subdirectory

33 agent READMEs, 14 hand READMEs, 2 plugin READMEs
(echo-memory + hooks), and 2 skill READMEs
(custom-skill-prompt + custom-skill-python).

Each README documents the component's purpose, configuration,
and usage based on its TOML definition.

hands/strategist/README.md

@@ -0,0 +1,32 @@
+# Strategist Hand
+
+Autonomous strategy analyst -- market research, competitive analysis, business planning, and strategic recommendations.
+
+## Configuration
+
+| Field | Value |
+|-------|-------|
+| Category | `productivity` |
+| Agent | `strategist-hand` |
+| Routing | `strategic analysis`, `competitive analysis`, `business plan`, `market research` |
+
+## Integrations
+
+None required.
+
+## Settings
+
+- **Focus Area** -- `general`, `market_entry`, `competitive`, `product`, `growth`
+- **Analysis Depth** -- `quick`, `thorough`, `comprehensive`
+- **Industry** -- Primary industry to focus on
+- **Key Competitors** -- Comma-separated list of competitors to track
+- **Auto Monitor** -- Track competitor moves automatically (default: off)
+- **Report Format** -- `executive`, `detailed`, `slide_deck`, `memo`
+- **Confidence Threshold** -- `low`, `medium`, `high`
+- **Preferred Frameworks** -- e.g. `SWOT`, `Porter`, `PESTEL`
+
+## Usage
+
+```bash
+librefang hand run strategist
+```