[circle-verify] Readme (#8635)

* [circle-verify] Readme

This will introduce circle-verify readme file explaining it's usage

Signed-off-by: SaeHie Park <saehie.park@samsung.com>
* edit about

* change output format

diff --git a/compiler/circle-verify/README.md b/compiler/circle-verify/README.md
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+# circle-verify
+
+_circle-verify_ allows users to verify Circle models.
+
+## Usage
+
+Provide _circle_ file as a parameter to verify validity.
+
+```
+$ circle-verify circlefile.circle
+```
+
+Result for valid file
+```
+[ RUN       ] Check circlefile.circle
+[      PASS ] Check circlefile.circle
+```
+
+Result for invalid file
+```
+[ RUN       ] Check circlefile.circle
+[      FAIL ] Check circlefile.circle
+```