chore: release v1.1.0 - add Support Team Guide and User Guide, update all docs to v1.1.0

skills/item-analysis-tool/SKILL.md

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+---
+name: item-analysis-tool
+description: Performs statistical analysis on assessment items including difficulty, discrimination, and distractor effectiveness.
+---
+
+# item-analysis-tool
+
+## Capabilities
+
+- Calculate item difficulty indices
+- Calculate point-biserial discrimination
+- Analyze distractor performance
+- Flag problematic items
+
+## Usage
+
+Use this skill when:
+- Analyzing pilot test data
+- Reviewing item performance after administration
+- Improving assessment quality
+
+## Input
+
+Item response data (learner responses with correct/incorrect indicators).
+
+## Output
+
+Item analysis report with:
+- Difficulty index (p-value) for each item
+- Discrimination index for each item
+- Distractor analysis
+- Items flagged for review
+
+## Limitations
+
+- Requires response data from actual administration
+- Statistical validity depends on sample size
+- Does not assess content validity
+
+## Assumptions
+
+- Response data is complete and accurate
+- Minimum sample size of 30 for reliable statistics