Migrate the docs from readme to sphinx docs

.agent/workflows/documentation_style.md

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+---
+description: Documentation style rules for looptime RST files
+---
+
+All `.rst` documentation files in this project must follow these styling rules:
+
+### Page Title
+The page title must be enclosed in double-equal signs (`=`) both on top and at the bottom. The length of the underline/overline must match the title length.
+
+Example:
+```rst
+==========
+Page Title
+==========
+```
+
+### 1st Level Header
+The first level header (section) must be underlined with double-equal signs (`=`).
+
+Example:
+```rst
+Section Name
+============
+```
+
+### 2nd Level Header
+The second level header (sub-section) must be underlined with single-dash characters (`-`).
+
+Example:
+```rst
+Sub-section Name
+----------------
+```
+
+### 3rd Level and deeper
+If needed, use `~` for 3rd level and `^` for 4th level headers.

.readthedocs.yaml

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+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+version: 2
+formats: all
+build:
+  os: ubuntu-24.04
+  tools:
+    python: "3"
+  jobs:
+    install:
+      - pip install --upgrade pip
+      - pip install --group docs -e .
+sphinx:
+  configuration: docs/conf.py
+  builder: "dirhtml"
+#  fail_on_warning: true