move docs to root

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

docs/history.md

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+## History Search
+
+The History page has a built-in search bar with two modes:
+
+**Fulltext search**: press `/` to open it. Results filter in real time as you type across all fields: method, host, path, and the raw request/response bodies.
+
+**SQL mode**: press `:` to open it, then `Enter` to run. You can write either a WHERE expression or a full SELECT query against the `entries` table.
+
+WHERE expression (the `SELECT` is added automatically):
+
+```sql
+status_code = 404
+```
+
+```sql
+host LIKE '%.api.%' AND method = 'POST'
+```
+
+Full SELECT query:
+
+```sql
+SELECT * FROM entries WHERE response_raw LIKE '%password%' ORDER BY timestamp DESC LIMIT 20
+```
+
+The `entries` table has the following columns: `id`, `timestamp`, `method`, `host`, `path`, `status_code`, `request_raw`, `response_raw`.