feat: add README.md for annotation usage and examples

Author: smutyala1at

README.md

@@ -0,0 +1,41 @@
+## Annotation Usage
+
+### How to Use Annotations in Markdown Files
+
+To annotate the content with domain terminology, wrap the text in annotation blocks using the following format:
+
+```
+<!-- BEGIN-ANNOTATION: ontology_id -->
+The text goes here.
+<!-- END-ANNOTATION: ontology_id -->
+```
+
+This annotation functionality automatically identifies and enriches domain-specific terminology with semantic hyperlinks.
+
+### Available Ontologies
+
+The following ontology IDs are supported:
+
+- `oeo`
+- `brick`
+- `sms`
+- `fmi`
+- `dogont`
+- `s4grid`
+- `sargon`
+- `s4ener`
+- `bont`
+- `openadr`
+- `dices`
+
+### Example
+
+```
+<!-- BEGIN-ANNOTATION: oeo -->
+electrical energy is a form of energy derived from the potential or kinetic energy of charged particles.
+<!-- END-ANNOTATION: oeo -->
+
+<!-- BEGIN-ANNOTATION: brick -->
+Building automation systems monitor temperature sensors.
+<!-- END-ANNOTATION: brick -->
+```