Update of Readme and documentation (#2514)

* Big readme update

* Readme and documentation update

* Readme structure update

* Small fixes

* Changelog update

docs/source/library-usage.rst

@@ -0,0 +1,139 @@
+.. _library-usage:
+
+Library usage
+=============
+
+Maigret's CLI is a thin wrapper around an async Python API. You can embed Maigret in your own tools, pipelines, and OSINT workflows — no need to shell out.
+
+This page covers the common patterns. For the full argument list of the underlying function, see ``maigret.checking.maigret`` in the source.
+
+Installation
+------------
+
+.. code-block:: bash
+
+   pip install maigret
+
+Minimal example
+---------------
+
+A working end-to-end search against the top 500 sites:
+
+.. code-block:: python
+
+   import asyncio
+   import logging
+
+   from maigret import search as maigret_search
+   from maigret.sites import MaigretDatabase
+
+   # Load the bundled site database
+   db = MaigretDatabase().load_from_path(
+       "maigret/resources/data.json"
+   )
+
+   # Pick which sites to scan (same filtering the CLI uses)
+   sites = db.ranked_sites_dict(top=500)
+
+   results = asyncio.run(
+       maigret_search(
+           username="soxoj",
+           site_dict=sites,
+           logger=logging.getLogger("maigret"),
+           timeout=30,
+           is_parsing_enabled=True,
+       )
+   )
+
+   for site_name, result in results.items():
+       if result["status"].is_found():
+           print(site_name, result["url_user"])
+
+Key points:
+
+- ``maigret_search`` is an ``async`` function — wrap it with ``asyncio.run(...)`` or ``await`` it from inside your own event loop.
+- ``is_parsing_enabled=True`` turns on ``socid_extractor`` so ``result["ids_data"]`` is populated with profile fields (bio, linked accounts, uids, etc.).
+- Each entry in the returned dict has a ``"status"`` object with ``is_found()``, plus ``url_user``, ``http_status``, ``rank``, ``ids_data``, and more.
+
+Filtering sites
+---------------
+
+``ranked_sites_dict`` accepts the same filters as the CLI:
+
+.. code-block:: python
+
+   # All sites tagged as coding, top 200 by rank
+   sites = db.ranked_sites_dict(top=200, tags=["coding"])
+
+   # Exclude NSFW and dating sites
+   sites = db.ranked_sites_dict(excluded_tags=["nsfw", "dating"])
+
+   # Only specific sites by name
+   sites = db.ranked_sites_dict(names=["GitHub", "Reddit", "VK"])
+
+   # Include disabled sites (useful for maintenance / self-check)
+   sites = db.ranked_sites_dict(disabled=True)
+
+Running inside an existing event loop
+-------------------------------------
+
+If your application already runs an asyncio loop (FastAPI, aiohttp server, a Discord bot, etc.), ``await`` ``maigret_search`` directly instead of calling ``asyncio.run``:
+
+.. code-block:: python
+
+   async def check_username(username: str) -> dict:
+       results = await maigret_search(
+           username=username,
+           site_dict=sites,
+           logger=logger,
+           timeout=30,
+       )
+       return {
+           name: r["url_user"]
+           for name, r in results.items()
+           if r["status"].is_found()
+       }
+
+Routing through a proxy
+-----------------------
+
+The same proxy / Tor / I2P flags the CLI exposes are plain keyword arguments:
+
+.. code-block:: python
+
+   results = await maigret_search(
+       username="soxoj",
+       site_dict=sites,
+       logger=logger,
+       proxy="socks5://127.0.0.1:1080",
+       tor_proxy="socks5://127.0.0.1:9050",   # used for .onion sites
+       i2p_proxy="http://127.0.0.1:4444",     # used for .i2p sites
+       timeout=30,
+   )
+
+Full function signature
+-----------------------
+
+.. code-block:: python
+
+   async def maigret(
+       username: str,
+       site_dict: Dict[str, MaigretSite],
+       logger,
+       query_notify=None,
+       proxy=None,
+       tor_proxy=None,
+       i2p_proxy=None,
+       timeout=30,
+       is_parsing_enabled=False,
+       id_type="username",
+       debug=False,
+       forced=False,
+       max_connections=100,
+       no_progressbar=False,
+       cookies=None,
+       retries=0,
+       check_domains=False,
+   ) -> QueryResultWrapper
+
+See :doc:`command-line-options` for a description of each option — the semantics match the CLI flags one-to-one.