Added unit tests for BigInt data type and updated docs

.github/workflows/clang-build.yml

@@ -0,0 +1,19 @@
+name: clang-build
+on: [push,pull_request,workflow_dispatch]
+
+jobs:
+  clang-build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Clang
+        run: sudo apt update && sudo apt install -y clang
+
+      - name: Build Datum
+        run: |
+          make clean all
+
+      - name: Run unit tests
+        run: |
+          ./test_vector && ./test_map && ./test_bigint

.github/workflows/gcc-build.yml

@@ -1,17 +1,16 @@
-name: datum
-on:
-  push:
-    branch: [master]
-  workflow_dispatch:
+name: gcc-build
+on: [push,pull_request,workflow_dispatch]
 
 jobs:
-  build:
+  gcc-build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+
       - name: Build Datum
         run: |
           make clean all
+
       - name: Run unit tests
         run: |
-          ./test_vector && ./test_map  
+          ./test_vector && ./test_map && ./test_bigint